src/tube-stream.c: Fix a leak in get_property for PROP_SUPPORTED_SOCKET_TYPES.
src/tube-stream.c: Fix a leak in get_property for PROP_SUPPORTED_SOCKET_TYPES.

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