glx: Increment dpy->request before issuing an error that had no request
This ensures the sequence number is unique and recent enough for callers of glXQueryDrawable
using XNextRequest
to selectively trap errors. The same approach is already used in glXCreateContextAttribsARB
.
Suggested-by: Sebastian Keller skeller@gnome.org
Related-to: https://gitlab.gnome.org/GNOME/mutter/-/issues/3007