[Bug 52532] SDL 2.0.20 doesn't restore fullscreen mode when restoring a window

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52532

--- Comment #5 from Esme Povirk  ---
It looks like we do not call sync_window_position from X11DRV_WindowPosChanged
because we are processing an event (the WM_STATE client message which tells us
the window is restored) when SDL makes the request to fullscreen the window.
And then we get a ConfigureNotify with the old size from the WM so the window's
fullscreen geometry is clobbered.

Maybe we should still call update_net_wm_states even if events are pending?