From 2cbe90902d91bb5af22c40a827595acda4e87866 Mon Sep 17 00:00:00 2001
From: Gael-de-Sailly <gael.chretien@akeonet.com>
Date: Mon, 17 Aug 2015 22:08:59 +0200
Subject: [PATCH] Fixed fatal error about mobs in unknown nodes

---
 mods/mobs/api.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mods/mobs/api.lua b/mods/mobs/api.lua
index a46ea86a..c3e1db38 100755
--- a/mods/mobs/api.lua
+++ b/mods/mobs/api.lua
@@ -233,6 +233,9 @@ function mobs:register_mob(name, def)
 				local nod = minetest.get_node_or_nil(pos)
 				if nod then nod = nod.name else nod = "default:dirt" end
 				local nodef = minetest.registered_nodes[nod]
+				if not nodef then
+					nodef = {groups = {}}
+				end
 
 				local v = self.object:getvelocity()
 				if v.y > 0.1 then