The SPDX-License-Identifier said LGPL-2.1-or-later, but the license
grant was a permissive license, which we now identify as
LicenseRef-old-glib-tests.
Signed-off-by: Simon McVittie <smcv@collabora.com>
We're calling g_object_notify so let's not make gobject to call it for
us.
This also allows to test that changing a property again doesn't lead to
dispatch properties being called.
This tests that we call a custom dispatch_properties_changed,
even in the absence of connected notify handlers. (A recent
optimization broke that and caused a regression in GTK).
