Building Xwayland without glamor support would raise a warning at build
time:
xwayland.c: In function ‘xwl_screen_init’:
xwayland.c:980:10: warning: unused variable ‘use_eglstreams’
980 | Bool use_eglstreams = FALSE;
| ^~~~~~~~~~~~~~
When building without glamor support, we cannot have EGL Streams support
either, the two being related. So we do not need to declare the variable
`use_eglstreams` if glamor is not enabled.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>