Builtin: Fix error by digging unknown nodes

SmallJoker · SmallJoker · commit 3f675490df7d · 2020-02-16T14:13:52.000+01:00
diff --git a/builtin/game/item.lua b/builtin/game/item.lua
@@ -621,7 +621,7 @@ function core.node_dig(pos, node, digger)
 	core.remove_node(pos)
 
 	-- Play sound if it was done by a player
-	if diggername ~= "" and def.sounds and def.sounds.dug then
+	if diggername ~= "" and def and def.sounds and def.sounds.dug then
 		core.sound_play(def.sounds.dug, {
 			pos = pos,
 			exclude_player = diggername,
