present/wnmd: Translate update region to screen space

The region as passed in is in the source pixmap's coordinate space, so
intersecting it with the clipList (which is in screen space) resulted in

Fixes Firefox popups such as the hamburger menu when using the EGL

* Drop vblank->x/y_off from RegionTranslate call, since they're always
  0 here (present_wnmd_check_flip rejects flips for x/y_off != 0).

Reported-by: Robert Mader <>
Tested-by: Robert Mader <>
Reviewed-by: Olivier Fourdan <>
Tested-by: Joakim Tjernlund <> # v1
4 jobs for present_wnmd_execute-update-coordinate-space in 7 minutes and 32 seconds (queued for 1 second)