xfree86: On Linux, while only seat0 can have TTYs, don't assmume all seat0s have TTYs

5 jobs for fixnottyseat0 in 5 minutes and 27 seconds (queued for 7 seconds)
Status Name Job ID Coverage
  Docker Image
passed debian-buster #14732563

00:00:24

 
  Build And Test
passed autotools #14732564

00:05:03

passed meson #14732565

00:02:08

passed meson-noglamor #14732566

00:01:40

passed mingw-cross-build #14732567

00:00:42