Don't free handle-ref-tracking data structures until the connection is invalidated
Don't free handle-ref-tracking data structures until the connection is invalidated

This avoids repeated alloc/free cycles if a connection oscillates
between holding 0 and 1 handles.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib