fix table.empty, from auios

src/util/std.lua

@@ -5,7 +5,7 @@
 -- Table / List
 -- Whether a table contains no keys
 function table.empty(t)
-	return next(t)~=nil
+	return next(t)==nil
 end
 -- Apply a function to each key in a table
 function table.map(f, ...)