fix untiy_webapp_walk

unity_webapp_menu/unity_webapp_menu.module

@@ -15,7 +15,7 @@
  */
 function unity_webapp_menu_walk($tree) {
   $processedlink = array();
-  foreach ($object as $obj) {
+  foreach ($tree as $obj) {
     if ($obj['link'] && $obj['link']['link_title']) {
       $processedlink['name'] = $obj['link']['link_title'];
       $processedlink['href'] = $obj['link']['href'];