present: Call present_vblank_scrap in screen mode

This cleans up some code duplication. No functional change.

Signed-off-by: Roman Gilg <subdiff@gmail.com>
3 jobs for presentCodeCleanup in 7 minutes (queued for 122 minutes and 1 second)
Status Job ID Name Coverage
  Docker Image
passed #172410
debian-testing

00:00:29

 
  Build And Test
passed #172411
autotools-build-and-test

00:04:54

passed #172412
meson-build-and-test

00:01:36