gabble_roster_dup_states: actually copy the publish request
gabble_roster_dup_states: actually copy the publish request

Previously, this happened to work even though it was wrong, because we
leaked the publish request...

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