From: Marc-André Lureau <marcandre.lureau@redhat.com>

Since commit 6effaa16 ("ui: set cursor position upon listener
registration") a new error message shows up when starting qemu with gtk
backend:
qemu: Gdk: gdk_window_get_root_coords: assertion 'GDK_IS_WINDOW (window)' failed

Like many display listener callbacks, skip code if the widget is not yet
realized.

Fixes: 6effaa16 ("ui: set cursor position upon listener registration")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 ui/gtk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ui/gtk.c b/ui/gtk.c
index 57ae32474c..f3105796f8 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -450,7 +450,8 @@ static void gd_mouse_set(DisplayChangeListener *dcl,
     GdkDisplay *dpy;
     gint x_root, y_root;
 
-    if (qemu_input_is_absolute()) {
+    if (qemu_input_is_absolute() ||
+        !gtk_widget_get_realized(vc->gfx.drawing_area)) {
         return;
     }
 
-- 
2.39.2