Adds defines for organ slots

code/game/gamemodes/changeling/evolution_menu.dm

@@ -75,7 +75,7 @@
 		var/datum/changelingprofile/prof = mind.changeling.add_new_profile(C, src)
 		mind.changeling.first_prof = prof
 
-		var/obj/item/organ/brain/B = C.getorganslot("brain")
+		var/obj/item/organ/brain/B = C.getorganslot(ORGAN_SLOT_BRAIN)
 		if(B)
 			B.vital = FALSE
 			B.decoy_override = TRUE

code/game/gamemodes/changeling/powers/augmented_eyesight.dm

@@ -10,7 +10,7 @@
 	active = FALSE
 
 /obj/effect/proc_holder/changeling/augmented_eyesight/on_purchase(mob/user) //The ability starts inactive, so we should be protected from flashes.
-	var/obj/item/organ/eyes/E = user.getorganslot("eye_sight")
+	var/obj/item/organ/eyes/E = user.getorganslot(ORGAN_SLOT_EYES)
 	if (E)
 		E.flash_protect = 2 //Adjust the user's eyes' flash protection
 		to_chat(user, "We adjust our eyes to protect them from bright lights.")
@@ -20,7 +20,7 @@
 /obj/effect/proc_holder/changeling/augmented_eyesight/sting_action(mob/living/carbon/human/user)
 	if(!istype(user))
 		return
-	var/obj/item/organ/eyes/E = user.getorganslot("eye_sight")
+	var/obj/item/organ/eyes/E = user.getorganslot(ORGAN_SLOT_EYES)
 	if(E)
 		if(!active)
 			E.sight_flags |= SEE_MOBS | SEE_OBJS | SEE_TURFS //Add sight flags to the user's eyes
@@ -42,7 +42,7 @@
 
 
 /obj/effect/proc_holder/changeling/augmented_eyesight/on_refund(mob/user) //Get rid of x-ray vision and flash protection when the user refunds this ability
-	var/obj/item/organ/eyes/E = user.getorganslot("eye_sight")
+	var/obj/item/organ/eyes/E = user.getorganslot(ORGAN_SLOT_EYES)
 	if(E)
 		if (active)
 			E.sight_flags ^= SEE_MOBS | SEE_OBJS | SEE_TURFS

code/game/gamemodes/changeling/powers/regenerate.dm

@@ -27,7 +27,7 @@
 			C.emote("scream")
 			C.regenerate_limbs(1)
 		C.regenerate_organs()
-		if(!user.getorganslot("brain"))
+		if(!user.getorganslot(ORGAN_SLOT_BRAIN))
 			var/obj/item/organ/brain/changeling_brain/B = new()
 			B.Insert(C)
 	if(ishuman(user))