Merge pull request #6048 from Heroman3003/promcore-decay-fix

Fixes promethean cores decaying pointlessly

code/modules/organs/internal/brain.dm

@@ -152,6 +152,7 @@ GLOBAL_LIST_BOILERPLATE(all_brain_organs, /obj/item/organ/internal/brain)
 	name = "slime core"
 	desc = "A complex, organic knot of jelly and crystalline particles."
 	icon_state = "core"
+	decays = FALSE
 	parent_organ = BP_TORSO
 	clone_source = TRUE
 	flags = OPENCONTAINER

code/modules/organs/organ.dm

@@ -29,6 +29,7 @@ var/list/organ_cache = list()
 	var/max_damage						// Damage cap
 	var/can_reject = 1					// Can this organ reject?
 	var/rejecting						// Is this organ already being rejected?
+	var/decays = TRUE					// Can this organ decay at all?
 	var/preserved = 0					// If this is 1, prevents organ decay.
 
 	// Language vars. Putting them here in case we decide to do something crazy with sign-or-other-nonverbal languages.
@@ -135,7 +136,7 @@ var/list/organ_cache = list()
 		if(B && prob(40))
 			reagents.remove_reagent("blood",0.1)
 			blood_splatter(src,B,1)
-		if(config.organs_decay) damage += rand(1,3)
+		if(config.organs_decay && decays) damage += rand(1,3)
 		if(damage >= max_damage)
 			damage = max_damage
 		adjust_germ_level(rand(2,6))