[MIRROR] Replaced body zone magic strings with defines (#6004)

* Replaced body zone magic strings with defines

* merge conflicts

code/modules/food_and_drinks/drinks/drinks.dm

@@ -393,7 +393,7 @@
 	return BRUTELOSS
 
 /obj/item/reagent_containers/food/drinks/soda_cans/attack(mob/M, mob/user)
-	if(M == user && !src.reagents.total_volume && user.a_intent == INTENT_HARM && user.zone_selected == "head")
+	if(M == user && !src.reagents.total_volume && user.a_intent == INTENT_HARM && user.zone_selected == BODY_ZONE_HEAD)
 		user.visible_message("<span class='warning'>[user] crushes the can of [src] on [user.p_their()] forehead!</span>", "<span class='notice'>You crush the can of [src] on your forehead.</span>")
 		playsound(user.loc,'sound/weapons/pierce.ogg', rand(10,50), 1)
 		var/obj/item/trash/can/crushed_can = new /obj/item/trash/can(user.loc)

code/modules/food_and_drinks/drinks/drinks/bottle.dm

@@ -67,7 +67,7 @@
 		armor_block = H.run_armor_check(affecting, "melee","","",armour_penetration) // For normal attack damage
 
 		//If they have a hat/helmet and the user is targeting their head.
-		if(istype(H.head, /obj/item/clothing/head) && affecting == "head")
+		if(istype(H.head, /obj/item/clothing/head) && affecting == BODY_ZONE_HEAD)
 			headarmor = H.head.armor.melee
 		else
 			headarmor = 0
@@ -78,7 +78,7 @@
 	else
 		//Only humans can have armor, right?
 		armor_block = target.run_armor_check(affecting, "melee")
-		if(affecting == "head")
+		if(affecting == BODY_ZONE_HEAD)
 			armor_duration = duration + force
 
 	//Apply the damage!
@@ -87,7 +87,7 @@
 
 	// You are going to knock someone out for longer if they are not wearing a helmet.
 	var/head_attack_message = ""
-	if(affecting == "head" && istype(target, /mob/living/carbon/))
+	if(affecting == BODY_ZONE_HEAD && istype(target, /mob/living/carbon/))
 		head_attack_message = " on the head"
 		//Knockdown the target for the duration that we calculated and divide it by 5.
 		if(armor_duration)