Pekka Paalanen e156fb681e window: remove pointers to widget on destroy
Input devices may hold a pointer to the widget being destroyed. Reset
such pointers in widget_destroy().

This fixes a use-after-free in window_destroy(), if an application
destroys its widgets before the window.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
2012-01-19 16:41:55 +02:00
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