McdDispatchOperation: only have one lost_channel, too
McdDispatchOperation: only have one lost_channel, too

https://bugs.freedesktop.org/show_bug.cgi?id=52305

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control