V4: Do not call dtor of an object we continue to use

After destroyObject(), the QObjectWrapper is still alive. We might use
its heap object again. Furthermore, the Heap::QObjectWrapper dtor does
not actually do anything defined. What we want to do here is clear the
QObject pointer because we've just gotten rid of the QObject. There is a
method for that: Heap::QObjectWrapper::destroy().

Finally, the internalClass must never ever be nullptr. Assert on that
rather than checking it.

Task-number: QTBUG-100431
Change-Id: I794a295c182b2ed4ba80673f58d6143c861b7391
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 6c197319f34b8098d034f1543eb5feb9d7be54c3)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions