500 error on deletion of a user

[Xack]

I went to delete the demo user after a brand new install, gives 500 error.
PHP Fatal error: Call to a member function delete() on a non-object in /protected/modules/user/controllers/YumUserController.php on line 293,

I don't know the code well enough for a quick fix. :)

[thyseus]

did you activate a cache component? if not, please
try to add
'cache' => array('class' => 'CDummyCache') to your
components/ and try again. This is also documented.

If this error still happens, i committed a fix.

Issue will be closed once you confirm, thank you.