weston: xwayland: fix incorrect position of window at 0,0
Integrating patch from upstream: https://gitlab.freedesktop.org/wayland/weston/-/commit/1cb46994e3808e8000300ed9ae9dcaa0b76bff28
The patch fixes position of X application running with parameter "-geometry +0+0".
Signed-off-by: Dmitry Petrov dmitry.petrov@rtsoft.de