Chris Lord f9d7650b97 actor: Ensure the validity of the queue_redraw_entry pointer
In _clutter_actor_queue_redraw_with_clip, there was the possibility that
the actor will add itself to the stage's redraw queue without keeping track
of the allocated list member.

In clutter_actor_unparent, the redraw queue entry was being invalidated
before the mapped notify signal was being fired, meaning that queueing a
redraw of an unmapped actor in the mapped notification callback could
cause a crash.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2621
2011-05-14 01:14:22 +01:00
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