Location: make update_location_from_msg take a handle
Location: make update_location_from_msg take a handle

This is basically symmetrical, but will make handling explicit PEP
queries to our own JID work more reliably when that's readded next.

mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble