Prevents some artifacts spawning mobs within objs. (#10615)

code/modules/mob/abstract/freelook/ai/chunk.dm

@@ -16,7 +16,8 @@
 			var/mob/living/silicon/ai/AI = source
 			if (AI.stat == DEAD)
 				continue
-			for(var/turf/t in seen_turfs_in_range(AI, world.view))
+			for(var/T in seen_turfs_in_range(AI, world.view))
+				var/turf/t = T
 				visible[t] = t
 		else
 			log_visualnet("Contained an unhandled source", source)

code/modules/mob/abstract/freelook/chunk.dm

@@ -183,10 +183,10 @@
 	return
 
 /proc/seen_turfs_in_range(var/source, var/range)
+	. = list()
 	var/turf/pos = get_turf(source)
 	if(pos)
-		. = hear(range, pos)
-	else
-		. = list()
+		for(var/turf/T in hear(range, pos))
+			. += T
 
 #undef UPDATE_BUFFER