bug in Cache_Lite

Hi Marty First of all, congrats on a great class, I use it all the time. Not sure if something changed recently, but the clean method now returns void, whereas it should return boolean:

    /**
    * Clean the cache
    *
    * if no group is specified all cache files will be destroyed
    * else only cache files of the specified group will be destroyed
    *
    * @param string $group name of the cache group
    * @param string $mode flush cache mode : 'old', 'ingroup', 'notingroup'
    * @return boolean true if no problem
    * @access public
    */
    function clean($group = false, $mode = 'ingroup')
    {
        $this->_cleanDir($this->_cacheDir, $group, $mode);
    }

cheers Demian