Initialize selected_candidate to an appropriate value.
Initialize selected_candidate to an appropriate value.

This simplifies its get handler and fixes a possible problem of freeing
regardless of whether or not it was actually set.

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