Various small fixes

- Also do atomic operations on nodedb
- no longer require Worldedit for at_sync_ndb
- "overrun LZB 0 restriction" should now show where it happened.

advtrains/nodedb.lua

@@ -81,7 +81,8 @@ end
 
 --save
 function ndb.save_data()
-	local file, err = io.open(path, "wb")
+	local tmppath = path.."~"
+	local file, err = io.open(tmppath, "wb")
 	if not file then
 		atwarn("Couldn't save the node database: ", err or "Unknown Error")
 	else
@@ -97,6 +98,7 @@ function ndb.save_data()
 		end
 		file:close()
 	end
+	os.rename(tmppath, path)
 	return {nodeids = ndb_nodeids}
 end
 
@@ -288,7 +290,7 @@ minetest.register_chatcommand("at_sync_ndb",
 	{
         params = "", -- Short parameter description
         description = "Write node db back to map and find ghost nodes", -- Full description
-        privs = {train_operator=true, worldedit=true}, -- Require the "privs" privilege to run
+        privs = {train_operator=true}, 
         func = function(name, param)
 			return advtrains.pcall(function()
 				if not minetest.check_player_privs(name, {server=true}) and os.time() < ptime+30 then

advtrains_interlocking/approach.lua

@@ -17,7 +17,7 @@ local il = advtrains.interlocking
 local function get_over_function(speed, shunt)
 	return function(pos, id, train, index, speed, lzbdata)
 		if speed == 0 and minetest.settings:get_bool("at_il_force_lzb_halt") then
-			atwarn(id,"overrun LZB 0 restriction (red signal) ",ent.pos)
+			atwarn(id,"overrun LZB 0 restriction (red signal) ",pos)
 			-- Set train 1 index backward. Hope this does not lead to bugs...
 			train.index = index - 0.5
 			train.velocity = 0