Fix type-argument mismatches related to GLib.GenericArray/List
tpf-persona-store.vala:1175.38-1175.67: error: Argument 1: Cannot convert from `GLib.GenericArray<weak TelepathyGLib.Contact>' to `unowned GLib.GenericArray<TelepathyGLib.Contact>'
this._contact_list_changed_cb (this._conn.dup_contact_list (),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed: 1 error(s), 0 warning(s)
and more