Carlos Garnacho ca51cd8488 core: Prepare MetaStackTracker for X11 display being closed
If the display is closed prematurely, go through all windows that
look X11-y and remove them for future calculations. This is not
strictly needed as Xwayland should shut down orderly (thus no client
windows be there), but doesn't hurt to prepare in advance for the
cases where it might not be the case.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/709
2019-08-06 00:41:36 +00:00
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