From 7b0a1cf233b18a17b0d00721cd03c3f4b49e1b28 Mon Sep 17 00:00:00 2001
From: TenPlus1 <kinsellaja@yahoo.com>
Date: Fri, 8 Sep 2017 09:41:36 +0100
Subject: [PATCH] added spawner entity check

---
 spawner.lua | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spawner.lua b/spawner.lua
index 8aa5e32..7e75aac 100644
--- a/spawner.lua
+++ b/spawner.lua
@@ -171,7 +171,8 @@ minetest.register_abm({
 			pos2.y = pos2.y + 0.5
 
 			-- only if light levels are within range
-			if lig >= mlig and lig <= xlig then
+			if lig >= mlig and lig <= xlig
+			and minetest.registered_entities[mob] then
 				minetest.add_entity(pos2, mob)
 			end
 		end