* t/GtkHBox.t: Test that widgets packed into a box are completely freed upon
removal even if they previously appeared as a callback argument.  This is a
test for a recent memory leak fix in Glib.

* t/GtkTreeModelIface.t: The leak fix mentioned above causes this test to
correctly run FINALIZE_INSTANCE now, so adjust the test plan.

svn path=/trunk/; revision=2154