On headless systems, Wine can still run through a VNC connection even though no outputs are
connected. Fallback to using the Xinerama display device handler in this case to report at least
one monitor.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49500Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>