present: fallback get_crtc to return crtc belonging to screen with present extension

Since crtc can belong to secondary output that may not have present
extension enabled we should fallback to first enabled crtc or fake crtc.

Fix for issue xorg/xserver#1195
5 jobs for issue1195_fix in 5 minutes and 12 seconds (queued for 10 seconds)
Status Name Job ID Coverage
  Docker Image
passed debian-buster #11963498

00:00:15

 
  Build And Test
passed autotools #11963499

00:04:56

passed meson #11963500

00:01:56

passed meson-noglamor #11963501

00:01:43

passed mingw-cross-build #11963502

00:00:35