Fix assembly tool bug with non-empty chests

mod.conf

@@ -2,3 +2,4 @@ name = techage
 depends = default,doors,flowers,tubelib2,networks,basic_materials,bucket,stairs,screwdriver,minecart,lcdlib,safer_lua,doclib
 optional_depends = unified_inventory,wielded_light,unifieddyes,moreores,ethereal,mesecons,mesecons_materials,mesecons_mvps,digtron,bakedclay,moreblocks,i3,creative,craftguide,farming
 description = Techage, go through 5 tech ages in search of wealth and power!
+supported_games = minetest_game

tools/assembly_tool.lua

@@ -73,6 +73,10 @@ local function remove_node(pos, digger)
 		return
 	end
 	
+	if ndef.can_dig and not ndef.can_dig(pos, digger) then
+		return
+	end
+
 	if number ~= "" and ndef and ndef.after_dig_node then
 		minetest.remove_node(pos)
 		ndef.after_dig_node(pos, node, oldmetadata, digger)