- Patch #285165 by Damien Tournoud, pwolanin, chx: fixed wildcard loader problem

includes/menu.inc

@@ -2279,7 +2279,7 @@ function _menu_router_build($callbacks) {
       // Look for wildcards in the form allowed to be used in PHP functions,
       // because we are using these to construct the load function names.
       // See http://php.net/manual/en/language.functions.php for reference.
-      if (preg_match('/^%([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)$/', $part, $matches)) {
+      if (preg_match('/^%(|[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)$/', $part, $matches)) {
         if (empty($matches[1])) {
           $match = TRUE;
           $load_functions[$k] = NULL;