bonjour-contact-manager: Unref contact only if it has no services
bonjour-contact-manager: Unref contact only if it has no services

We remove the contact ref only if it has no services

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut