cleanup

internal1.lua

@@ -167,7 +167,8 @@ end
 function Tube:update_secondary_node(fpos,fdir, npos,ndir)
 	-- [s]<-[n]----[f]->[s]
 	local fpos2, node = self:get_node(fpos, fdir)
-	if minetest.registered_nodes[node.name].tubelib2_on_update then
+	if minetest.registered_nodes[node.name] and 
+			minetest.registered_nodes[node.name].tubelib2_on_update then
 		local npos2 = self:get_pos(npos, ndir)
 		if vector.equals(npos2, fpos2) then  -- last tube removed?
 			npos2,ndir = nil,nil  -- used to delete the data base

internal2.lua

@@ -152,7 +152,6 @@ function Tube:connected(pos, dir)
 	local node = get_node_lvm(npos)
 	return self.primary_node_names[node.name] 
 		or self.secondary_node_names[node.name]
-		or self.legacy_node_names[node.name]
 end
 
 -- Determine dirs via surrounding nodes

tube_api.lua

@@ -47,7 +47,6 @@ function Tube:new(attr)
 		max_tube_length = attr.max_tube_length or 1000, 
 		primary_node_names = Tbl(attr.primary_node_names or {}), 
 		secondary_node_names = Tbl(attr.secondary_node_names or {}),
-		legacy_node_names = Tbl(attr.legacy_node_names or {}),
 		show_infotext = attr.show_infotext or false,
 		clbk_after_place_tube = attr.after_place_tube,
 		pairingList = {}, -- teleporting nodes
@@ -182,9 +181,6 @@ function Tube:pairing(pos, channel)
 
 		local tube_dir1 = self:store_teleport_data(pos, peer_pos)
 		local tube_dir2 = self:store_teleport_data(peer_pos, pos)
-
-		--self:delete_tube_meta_data(pos, tube_dir1)
-		--self:delete_tube_meta_data(peer_pos, tube_dir2)
 		local fpos1,fdir1 = self:repair_tube_line(pos, tube_dir1)
 		local fpos2,fdir2 = self:repair_tube_line(peer_pos, tube_dir2)
 		self:add_meta(fpos1, fpos2,fdir2)