warning: Invalid argument supplied for foreach() in Utility module

While running update.php against the August 28th, 2007 .dev, I saw a PHP warning.

warning: Invalid argument supplied for foreach() in /sites/all/modules/util/util.module on line 141.

Line 141 is:

139    function util_form_alter($form_id, &$form) {
140      global $_util_hook_files;
141      foreach ($_util_hook_files as $file => $hook) {

The update.php ran properly, and the site is functioning. This is just an FYI.