Jonas Ådahl 704bd4c331 wayland/subsurface: Handle clients committing on destroyed subsurface
A client can still commit state to a destroyed subsurface. It wont
update anything on the screen, since the subsurface will not be
visible, but mutter should still handle it and not crash.

https://bugzilla.gnome.org/show_bug.cgi?id=781391
2017-04-21 17:46:17 +08:00
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