PHP warning when viewing ?q=admin and nothing to see

If the user can't see any items @ ?q=admin, they receive the following error:

warning: Invalid argument supplied for foreach() in /Applications/MAMP/htdocs/head/modules/system/system.module on line 2165.

To reproduce this, give a user only "access administration pages" permission and nothing else. Apply the patch here: http://drupal.org/node/92015 to fix the "view logs coupled to access administration pages" bug. Go to ?q=admin. I think this can also be reproduced by manually moving all admin menus to something else like "Primary Links" or what have you.

At any rate, we should do something nicer than spit out an error when there's nothing to see here. :)