Ticket #2326: fix for uri in add_query_arg.diff

functions.php

@@ -2043 +2043 @@
 function add_query_arg() {
         $ret = '';
         if ( is_array(func_get_arg(0)) ) {
-                $uri = @func_get_arg(1);
+                if ( @func_num_args() < 2 )
+                        $uri = $_SERVER['REQUEST_URI'];
+                else
+                        $uri = @func_get_arg(1);
         } else {
                 if ( @func_num_args() < 3 )
                         $uri = $_SERVER['REQUEST_URI'];