Gives Guardman Helmet Armor (#3365)

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## About The Pull Request
Gives Guardman Helmet from sectech vender armor. Makes a second armored version and puts it there.
Fixes #1510
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## Why It's Good For The Game
fixes bug/oversight, gives sec 'drip' without costing armor
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## Changelog

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:cl:
fix: Security's Guardman Helmet now armored
/:cl:

code/modules/clothing/head/helmet.dm

@@ -144,6 +144,12 @@
 	inhand_icon_state = "blueshift_helmet"
 	custom_premium_price = PAYCHECK_COMMAND
 
+/obj/item/clothing/head/helmet/guardmanhelmet
+	name = "guardman's helmet"
+	desc = "Keeps your brain intact when fighting heretics"
+	icon = 'monkestation/icons/obj/clothing/hats.dmi'
+	worn_icon = 'monkestation/icons/mob/clothing/head.dmi'
+	icon_state = "guardman_helmet"
 
 /obj/item/clothing/head/helmet/toggleable
 	dog_fashion = null

code/modules/vending/security.dm

@@ -35,7 +35,7 @@
 		/obj/item/storage/belt/holster/energy = 4,
 		/obj/item/clothing/head/helmet/civilprotection_helmet = 1, //monkestation edit
 		/obj/item/clothing/suit/armor/civilprotection_vest = 1, //monkestation edit
-		/obj/item/clothing/head/guardmanhelmet = 1, //monkestation edit: Guardman
+		/obj/item/clothing/head/helmet/guardmanhelmet = 1, //monkestation edit: Guardman
 		/obj/item/clothing/under/guardmanuniform = 1, //monkestation edit: Guardman
 		/obj/item/clothing/suit/armor/guardmanvest = 1, //monkestation edit: Guardman
 		/obj/item/citationinator = 3 // monkestation edit: security assistants