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>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
3 jobs for presentCodeCleanup in 6 minutes and 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Docker Image
passed #202397
debian-testing

00:01:18

 
  Build And Test
passed #202398
autotools-build-and-test

00:05:34

passed #202399
meson-build-and-test

00:01:49