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

* Replaced body zone magic strings with defines

* merge conflicts

code/game/objects/items/storage/book.dm

@@ -215,7 +215,7 @@ GLOBAL_LIST_INIT(bibleitemstates, list("bible", "koran", "scrapbook", "bible",
 		uses -= 1
 		to_chat(H, "<span class='userdanger'>You try to open the book AND IT BITES YOU!</span>")
 		playsound(src.loc, 'sound/effects/snap.ogg', 50, 1)
-		H.apply_damage(5, BRUTE, pick("l_arm", "r_arm"))
+		H.apply_damage(5, BRUTE, pick(BODY_ZONE_L_ARM, BODY_ZONE_R_ARM))
 		to_chat(H, "<span class='notice'>Your name appears on the inside cover, in blood.</span>")
 		var/ownername = H.real_name
 		desc += "<span class='warning'>The name [ownername] is written in blood inside the cover.</span>"

code/game/objects/items/storage/boxes.dm

@@ -37,7 +37,7 @@
 	update_icon()
 
 /obj/item/storage/box/suicide_act(mob/living/carbon/user)
-	var/obj/item/bodypart/head/myhead = user.get_bodypart("head")
+	var/obj/item/bodypart/head/myhead = user.get_bodypart(BODY_ZONE_HEAD)
 	if(myhead)
 		user.visible_message("<span class='suicide'>[user] puts [user.p_their()] head into \the [src], and begins closing it! It looks like [user.p_theyre()] trying to commit suicide!</span>")
 		myhead.dismember()