[PATCH xserver] present/wnmd: Preserve window pixmap's screen_x/y on flip

[Roman Gilg]

On Thu, Jun 7, 2018 at 6:27 PM Michel Dänzer <michel at daenzer.net> wrote:
>
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> The incorrect values could result in the new pixmap's contents
> getting corrupted down the line.
>
> Bugzilla: https://bugs.freedesktop.org/106841
> Fixes: 029608dd8020 "present: Add window flip mode"

Thank you for patching this difficult to find issue. That's a
behavioral change to screen flips, that I missed.

Reviewed-by: Roman Gilg <subdiff at gmail.com>