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

5 jobs for fixnottyseat0 in 5 minutes and 36 seconds (queued for 8 seconds)
Status Name Job ID Coverage
  Docker Image
passed debian-buster #14928207

00:00:31

 
  Build And Test
passed autotools #14928208

00:05:04

passed meson #14928209

00:02:15

passed meson-noglamor #14928210

00:01:22

passed mingw-cross-build #14928211

00:00:49