console: fix dpy_gfx_replace_surface assert

virtio-gpu can trigger the assert added by commit "6905b93447 console:
add same surface replace pre-condition" in multihead setups (where
surface can be NULL for secondary displays).  Allow surface being NULL.

Fixes: 6905b93447
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170906142109.2685-1-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-09-06 16:21:09 +02:00
parent 35c4e86cf3
commit 1540008629

View File

@ -1540,7 +1540,7 @@ void dpy_gfx_replace_surface(QemuConsole *con,
DisplaySurface *old_surface = con->surface;
DisplayChangeListener *dcl;
assert(old_surface != surface);
assert(old_surface != surface || surface == NULL);
con->surface = surface;
QLIST_FOREACH(dcl, &s->listeners, next) {