Bunch of harddel fixes

code/datums/action.dm

@@ -366,16 +366,14 @@
 
 /datum/action/item_action/nano_picket_sign
 	name = "Retext Nano Picket Sign"
-	var/obj/item/picket_sign/S
-
-/datum/action/item_action/nano_picket_sign/New(Target)
-	..()
-	if(istype(Target, /obj/item/picket_sign))
-		S = Target
+	var/obj/item/picket_sign/sign
 
 /datum/action/item_action/nano_picket_sign/Trigger()
-	if(istype(S))
-		S.retext(owner)
+	if(!istype(target, /obj/item/picket_sign))
+		return
+
+	var/obj/item/picket_sign/sign = target
+	sign.retext(owner)
 
 /datum/action/item_action/adjust
 

code/datums/components/remote_materials.dm

@@ -39,6 +39,7 @@ handles linking back and forth.
 		// specify explicitly in case the other component is deleted first
 		var/atom/P = parent
 		mat_container.retrieve_all(P.drop_location())
+	mat_container = null
 	return ..()
 
 /datum/component/remote_materials/proc/_MakeLocal()
@@ -77,9 +78,11 @@ handles linking back and forth.
 /datum/component/remote_materials/proc/OnAttackBy(datum/source, obj/item/I, mob/user)
 	SIGNAL_HANDLER
 
-	if (silo && istype(I, /obj/item/stack))
-		if (silo.remote_attackby(parent, user, I))
-			return COMPONENT_NO_AFTERATTACK
+	if (!silo || !istype(I, /obj/item/stack))
+		return
+
+	if (silo.remote_attackby(parent, user, I))
+		return COMPONENT_NO_AFTERATTACK
 
 /datum/component/remote_materials/proc/OnMultitool(datum/source, mob/user, obj/item/I)
 	SIGNAL_HANDLER

code/game/objects/items/implants/implant_misc.dm

@@ -110,6 +110,10 @@
 		radio.keyslot = new radio_key
 	radio.recalculateChannels()
 
+/obj/item/implant/radio/Destroy()
+	QDEL_NULL(radio)
+	return ..()
+
 /obj/item/implant/radio/mining
 	radio_key = /obj/item/encryptionkey
 

code/modules/atmospherics/machinery/airalarm.dm

@@ -239,8 +239,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/airalarm, 27)
 
 /obj/machinery/airalarm/Destroy()
 	SSradio.remove_object(src, frequency)
-	qdel(wires)
-	wires = null
+	QDEL_NULL(wires)
 	var/area/ourarea = get_area(src)
 	ourarea.atmosalert(FALSE, src)
 	return ..()

code/modules/clothing/under/accessories.dm

@@ -444,6 +444,10 @@
 	chameleon_action.chameleon_name = "Accessory"
 	chameleon_action.initialize_disguises()
 
+/obj/item/clothing/accessory/holster/chameleon/Destroy()
+	QDEL_NULL(chameleon_action)
+	return ..()
+
 /obj/item/clothing/accessory/holster/chameleon/emp_act(severity)
 	. = ..()
 	if(. & EMP_PROTECT_SELF)

code/modules/mob/living/simple_animal/hostile/mining_mobs/gutlunch.dm

@@ -43,12 +43,16 @@
 	animal_species = /mob/living/simple_animal/hostile/asteroid/gutlunch
 	childtype = list(/mob/living/simple_animal/hostile/asteroid/gutlunch/grublunch = 100)
 
+	var/mutable_appearance/gutlunch_full_overlay
+
 	wanted_objects = list(/obj/effect/decal/cleanable/xenoblood/xgibs, /obj/effect/decal/cleanable/blood/gibs/, /obj/item/organ, /obj/item/reagent_containers/food/snacks/meat/slab)
 
 /mob/living/simple_animal/hostile/asteroid/gutlunch/Initialize()
 	. = ..()
-	if(wanted_objects.len)
-		AddComponent(/datum/component/udder, /obj/item/udder/gutlunch, CALLBACK(src, PROC_REF(regenerate_icons)), CALLBACK(src, PROC_REF(regenerate_icons)))
+	if(!length(wanted_objects))
+		return
+	AddComponent(/datum/component/udder, /obj/item/udder/gutlunch, CALLBACK(src, TYPE_PROC_REF(/atom/movable, update_overlays)), CALLBACK(src, TYPE_PROC_REF(/atom/movable, update_overlays)))
+	gutlunch_full_overlay = mutable_appearance(icon, "gl_full")
 
 /mob/living/simple_animal/hostile/asteroid/gutlunch/CanAttack(atom/the_target) // Gutlunch-specific version of CanAttack to handle stupid stat_exclusive = true crap so we don't have to do it for literally every single simple_animal/hostile except the two that spawn in lavaland
 	if(isturf(the_target) || !the_target || the_target.type == /atom/movable/lighting_object) // bail out on invalids
@@ -72,14 +76,12 @@
 
 	return FALSE
 
-/mob/living/simple_animal/hostile/asteroid/gutlunch/regenerate_icons(new_udder_volume, max_udder_volume)
-	cut_overlays()
-	var/static/gutlunch_full_overlay
-	if(isnull(gutlunch_full_overlay))
-		gutlunch_full_overlay = iconstate2appearance(icon, "gl_full")
-	if(new_udder_volume == max_udder_volume)
-		add_overlay(gutlunch_full_overlay)
-	..()
+/mob/living/simple_animal/hostile/asteroid/gutlunch/update_overlays(new_udder_volume, max_udder_volume)
+	. = ..()
+	if(new_udder_volume != max_udder_volume)
+		return
+
+	. += gutlunch_full_overlay
 
 //Male gutlunch. They're smaller and more colorful!
 /mob/living/simple_animal/hostile/asteroid/gutlunch/gubbuck

code/modules/power/singularity/emitter.dm

@@ -119,6 +119,7 @@
 		log_game("Emitter deleted at [AREACOORD(T)]")
 		investigate_log("<font color='red'>deleted</font> at [AREACOORD(T)]", INVESTIGATE_SINGULO)
 	QDEL_NULL(sparks)
+	QDEL_NULL(wires)
 	return ..()
 
 /obj/machinery/power/emitter/update_icon_state()

code/modules/projectiles/boxes_magazines/_box_magazine.dm

@@ -73,6 +73,10 @@
 	for(var/i = max(1, stored_ammo.len), i <= max_ammo, i++)
 		stored_ammo += new round_check(src)
 
+/obj/item/ammo_box/Destroy()
+	stored_ammo.Cut()
+	return ..()
+
 ///gets a round from the magazine, if keep is TRUE the round will stay in the gun
 /obj/item/ammo_box/proc/get_round(keep = FALSE)
 	if(!stored_ammo.len)

code/modules/projectiles/gun.dm

@@ -262,8 +262,6 @@
 */
 	///The types of attachments allowed, a list of types. SUBTYPES OF AN ALLOWED TYPE ARE ALSO ALLOWED
 	var/list/valid_attachments = list()
-	///Reference to our attachment holder to prevent subtypes having to call GetComponent
-	var/datum/component/attachment_holder/attachment_holder
 	///Number of attachments that can fit on a given slot
 	var/list/slot_available = ATTACHMENT_DEFAULT_SLOT_AVAILABLE
 	///Offsets for the slots on this gun. should be indexed by SLOT and then by X/Y
@@ -339,7 +337,7 @@
 
 /obj/item/gun/ComponentInitialize()
 	. = ..()
-	attachment_holder = AddComponent(/datum/component/attachment_holder, slot_available, valid_attachments, slot_offsets, default_attachments)
+	AddComponent(/datum/component/attachment_holder, slot_available, valid_attachments, slot_offsets, default_attachments)
 	AddComponent(/datum/component/two_handed)
 
 /// triggered on wield of two handed item
@@ -384,6 +382,8 @@
 		QDEL_NULL(azoom)
 	if(muzzle_flash)
 		QDEL_NULL(muzzle_flash)
+	if(magazine)
+		QDEL_NULL(magazine)
 	return ..()
 
 /obj/item/gun/handle_atom_del(atom/A)
@@ -1011,15 +1011,24 @@
 	var/obj/item/gun/gun = null
 
 /datum/action/toggle_scope_zoom/Trigger()
+	if(!istype(target, /obj/item/gun) || !..())
+		return
+
+	var/obj/item/gun/gun = target
 	gun.zoom(owner, owner.dir)
 
 /datum/action/toggle_scope_zoom/IsAvailable()
 	. = ..()
 	if(!. && gun)
 		gun.zoom(owner, owner.dir, FALSE)
 
-/datum/action/toggle_scope_zoom/Remove(mob/living/L)
-	gun.zoom(L, L.dir, FALSE)
+/datum/action/toggle_scope_zoom/Remove(mob/user)
+	if(!istype(target, /obj/item/gun))
+		return ..()
+
+	var/obj/item/gun/gun = target
+	gun.zoom(user, user.dir, FALSE)
+
 	..()
 
 /obj/item/gun/proc/rotate(atom/thing, old_dir, new_dir)
@@ -1056,8 +1065,7 @@
 		return
 
 	if(zoomable)
-		azoom = new()
-		azoom.gun = src
+		azoom = new(src)
 
 /obj/item/gun/proc/build_firemodes()
 	if(FIREMODE_FULLAUTO in gun_firemodes)

code/modules/surgery/organs/vocal_cords.dm

@@ -37,6 +37,11 @@
 	name = "Voice of God"
 	var/obj/item/organ/vocal_cords/colossus/cords = null
 
+/datum/action/item_action/organ_action/colossus/Destroy()
+	if(cords)
+		QDEL_NULL(cords)
+	return ..()
+
 /datum/action/item_action/organ_action/colossus/New()
 	..()
 	cords = target