Prevents Shocking non-living Mobs (#13422)

code/game/machinery/doors/airlock.dm

@@ -289,8 +289,8 @@ About the new airlock wires panel:
 // shock user with probability prb (if all connections & power are working)
 // returns 1 if shocked, 0 otherwise
 // The preceding comment was borrowed from the grille's shock script
-/obj/machinery/door/airlock/shock(mob/user, prb)
-	if(!arePowerSystemsOn())
+/obj/machinery/door/airlock/shock(mob/living/user, prb)
+	if(!istype(user) || !arePowerSystemsOn())
 		return FALSE
 	if(shockCooldown > world.time)
 		return FALSE	//Already shocked someone recently?

code/game/machinery/machinery.dm

@@ -558,13 +558,12 @@ Class Procs:
 	return threatcount
 
 
-/obj/machinery/proc/shock(mob/user, prb)
-	if(inoperable())
+/obj/machinery/proc/shock(mob/living/user, prb)
+	if(!istype(user) || inoperable())
 		return FALSE
 	if(!prob(prb))
 		return FALSE
-	if(!isobserver(user))//if they are a ghost do not shock. Why do need cheesie honkers? You ded.
-		do_sparks(5, 1, src)
+	do_sparks(5, 1, src)
 	if(electrocute_mob(user, get_area(src), src, siemens_strength, TRUE))
 		return TRUE
 	return FALSE