diskstream_playlist_changed (boost::weak_ptr<Diskstream> (dstream));
dstream->RecordEnableChanged.connect_same_thread (*this, boost::bind (&Session::update_have_rec_enabled_diskstream, this));
diskstream_playlist_changed (boost::weak_ptr<Diskstream> (dstream));
dstream->RecordEnableChanged.connect_same_thread (*this, boost::bind (&Session::update_have_rec_enabled_diskstream, this));