call_stream_endpoint_new_candidates_cb: don't leak contents of array
call_stream_endpoint_new_candidates_cb: don't leak contents of array

gabble_call_candidates_to_array returns a dbus-glib boxed type whose
contents need to be freed explicitly.

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