fix splitstacks toggle in default chests

Author: OgelGames

compat-chests.lua

@@ -52,14 +52,13 @@ if minetest.get_modpath("default") then
 		end
 		local pn = player:get_player_name()
 		local chest_open = default.chest.open_chests[pn]
-		if not chest_open then
+		if not chest_open or not chest_open.pos then
 			-- chest already closed before formspec
 			return
 		end
 		local pos = chest_open.pos
-		local chest = pos and minetest.get_node(pos)
-		local is_pipeworks_chest = chest and pipeworks.chests[chest]
-		if is_pipeworks_chest and pipeworks.may_configure(pos, player) then
+		local node = minetest.get_node(pos)
+		if pipeworks.chests[node.name] and pipeworks.may_configure(pos, player) then
 			-- Pipeworks Switch
 			fs_helpers.on_receive_fields(pos, fields)
 			minetest.show_formspec(pn,