Merge pull request #20601 from optimumtact/missinglimbs

carbon mob bullet act now checks it's target zone exists before continuing

code/modules/mob/living/carbon/carbon_defense.dm

@@ -9,6 +9,14 @@
 	if(head && (head.flags & HEADBANGPROTECT))
 		return 1
 
+//Overridden so we can handle when it hits a limb that doesn't exist
+mob/living/carbon/bullet_act(obj/item/projectile/P, def_zone)
+	var/obj/item/bodypart/affecting = get_bodypart(def_zone)
+	if(!affecting) //that zone is dismembered
+		. = bullet_act(P, "chest")//act on chest instead
+	else
+		. = ..()//Proceed with standard handling
+
 /mob/living/carbon/check_projectile_dismemberment(obj/item/projectile/P, def_zone)
 	var/obj/item/bodypart/affecting = get_bodypart(def_zone)
 	if(affecting && affecting.dismemberable && affecting.get_damage() >= (affecting.max_damage - P.dismemberment))

code/modules/mob/living/carbon/human/human_defense.dm

@@ -3,11 +3,12 @@
 	var/organnum = 0
 
 	if(def_zone)
+		//Can pass in a bodypart or zone, so lets shortcut that handling
 		if(islimb(def_zone))
 			return checkarmor(def_zone, type)
-		var/obj/item/bodypart/affecting = get_bodypart(ran_zone(def_zone))
+		//Note the check_zone call, this changes UI target values to bodypart zones
+		var/obj/item/bodypart/affecting = get_bodypart(check_zone(def_zone))
 		return checkarmor(affecting, type)
-		//If a specific bodypart is targetted, check how that bodypart is protected and return the value.
 
 	//If you don't specify a bodypart, it checks ALL your bodyparts for protection, and averages out the values
 	for(var/X in bodyparts)