Index: admin_menu.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/admin_menu/admin_menu.inc,v
retrieving revision 1.11.2.20.2.25
diff -u -r1.11.2.20.2.25 admin_menu.inc
--- admin_menu.inc	21 Sep 2009 11:04:45 -0000	1.11.2.20.2.25
+++ admin_menu.inc	25 Dec 2009 18:03:42 -0000
@@ -198,16 +198,18 @@
   // Add Devel module links.
   if (module_exists('devel')) {
     // Add switch user links.
-    foreach (module_invoke('devel', 'switch_user_list') as $link) {
-      $links['account'][$link['title']] = array(
-        '#title' => $link['title'],
-        '#description' => $link['attributes']['title'],
-        '#href' => $link['href'],
-        '#options' => array(
-          'query' => $link['query'],
-          'html' => !empty($link['html']),
-        ),
-      );
+    if ($devel_user_links = module_invoke('devel', 'switch_user_list')) {
+      foreach ($devel_user_links as $link) {
+        $links['account'][$link['title']] = array(
+          '#title' => $link['title'],
+          '#description' => $link['attributes']['title'],
+          '#href' => $link['href'],
+          '#options' => array(
+            'query' => $link['query'],
+            'html' => !empty($link['html']),
+          ),
+        );
+      }
     }
   }