fix crashing when trying to call to a contact with no presence
fix crashing when trying to call to a contact with no presence


20060510155910-0e791-17f50e7835fcddfdbca621db53911ce32d37691a.gz

jku/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,Distrotech/telepathy-glib,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,mlundblad/telepathy-gabble,Distrotech/telepathy-glib,jku/telepathy-gabble,Ziemin/telepathy-gabble,Distrotech/telepathy-glib,community-ssu/telepathy-gabble,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble