Fix possible PHP warning, read default_folders using config->get() to suppo...

Aleksander Machniak

2012-08-21 fe2f0be4352ba0bc213a2c6d4dfcbbddea1a551c

 program/include/rcube_imap_cache.php

@@ -39,9 +39,9 @@
    private $imap;

    /**
     * Instance of rcube_mdb2
     * Instance of rcube_db
     *
     * @var rcube_mdb2
     * @var rcube_db
     */
    private $db;