_tp_dbus_daemon_get_name_owner: fail gracefully if TpDBusDaemon was invalidated
_tp_dbus_daemon_get_name_owner: fail gracefully if TpDBusDaemon was invalidated

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib