Fix crash during deletion
Fix crash during deletion

* Avoid double delete on EpisodeItem
* Fixes #28

HaikuArchives/BePodder,humdingerb/BePodder,humdingerb/BePodder,HaikuArchives/BePodder,HaikuArchives/BePodder,HaikuArchives/BePodder,humdingerb/BePodder,humdingerb/BePodder