Jasper St. Pierre 9c4908b44a xwayland: Don't crash when the window disappears from under us
If we attach to a MetaWindow that disappears before the idle fires,
we'll notice that we can't associate the window properly again and
try to access data on the MetaWindow struct, which might crash.

Install a weak ref that ties the lifetime of the idle to the lifetime
of the MetaWindow.

It seems every GTK+ app does this for some reason at startup. This
is really unfortunate, since we'll have to create and destroy a new
MetaWindow really quickly.
2014-05-04 15:51:53 -04:00
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