Nicolas Dufresne 210cf85fdc gl: x11: Issue XSync to close our top level window
This is similar action as when the window handle is modified, we now issue
XSync whenever we destroy our internal window. This ensure that the window is
properly closed before the connecgtion is dropped.

Fixes #815

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1226>
2021-07-15 16:22:48 +00:00
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