After 25167fb2 get_primary_monitor_rect()
returns an empty rectangle before X11DRV_DisplayDevices_Init() is called.
So use get_host_primary_monitor_rect() to get the current X desktop size.
It's also more intuitive this way.
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>