[MIRROR] Half fixes organ blood dna not updating (#1082)

* Half fixes organ blood dna not updating (#81584)

## About The Pull Request

Organs have this mechanic where they store the first mob who owned it's
DNA

Anyways it was broken from the organ nullspace refactor because they
intended a block of code that shouldn't have been indented

But this only *half* fixes the issue, you see a problem here?


![image](https://github.com/tgstation/tgstation/assets/51863163/886dd926-3242-4305-825b-a715d6848281)

Yeah there's an order of operation thing going on here because you get
your organs before you get your species bloodtype
This only affects species with weird blood types (like lizards)
I'm not fixing it in this PR because it was certainly broken before and
needs a bit more unwinding somewhere

## Changelog

:cl: Melbert
fix: Organs have the blood DNA of their owns on them again
/:cl:

* Half fixes organ blood dna not updating

---------

Co-authored-by: MrMelbert <[email protected]>

code/_globalvars/bitfields.dm

@@ -458,6 +458,8 @@ DEFINE_BITFIELD(organ_flags, list(
 	"ORGAN_VITAL" = ORGAN_VITAL,
 	"ORGAN_EDIBLE" = ORGAN_EDIBLE,
 	"ORGAN_UNREMOVABLE" = ORGAN_UNREMOVABLE,
+	"ORGAN_HIDDEN" = ORGAN_HIDDEN,
+	"ORGAN_VIRGIN" = ORGAN_VIRGIN,
 ))
 
 DEFINE_BITFIELD(respiration_type, list(

code/modules/forensics/_forensics.dm

@@ -230,11 +230,9 @@
 
 /// Updates the blood displayed on parent
 /datum/forensics/proc/check_blood()
-	if(!parent || !isitem(parent.resolve()))
-		return
-	if(isorgan(parent.resolve())) // organs don't spawn with blood decals by default
+	var/obj/item/the_thing = parent.resolve()
+	if(!istype(the_thing) || isorgan(the_thing)) // organs don't spawn with blood decals by default
 		return
 	if(!length(blood_DNA))
 		return
-	var/atom/parent_atom = parent.resolve()
-	parent_atom.AddElement(/datum/element/decal/blood)
+	the_thing.AddElement(/datum/element/decal/blood)

code/modules/surgery/organs/organ_movement.dm

@@ -58,12 +58,12 @@
 		else
 			replaced.forceMove(get_turf(receiver))
 
-		if(!IS_ROBOTIC_ORGAN(src) && (organ_flags & ORGAN_VIRGIN))
-			blood_dna_info = receiver.get_blood_dna_list()
-			// need to remove the synethic blood DNA that is initialized
-			// wash also adds the blood dna again
-			wash(CLEAN_TYPE_BLOOD)
-			organ_flags &= ~ORGAN_VIRGIN
+	if(!IS_ROBOTIC_ORGAN(src) && (organ_flags & ORGAN_VIRGIN))
+		blood_dna_info = receiver.get_blood_dna_list()
+		// need to remove the synethic blood DNA that is initialized
+		// wash also adds the blood dna again
+		wash(CLEAN_TYPE_BLOOD)
+		organ_flags &= ~ORGAN_VIRGIN
 
 	receiver.organs |= src
 	receiver.organs_slot[slot] = src