[PATCH spice-gtk] widget: Do not draw cursor if widget is not realized

[Pavel Grunt <pgrunt@xxxxxxxxxx>]

Silences the runtime warning in virt-viewer and gnome-boxes (bgo#744432):
Gtk-CRITICAL **: gtk_widget_queue_draw_area: assertion 'width >= 0' failed
---
 gtk/spice-widget.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtk/spice-widget.c b/gtk/spice-widget.c
index 1f7008a..f5e8aab 100644
--- a/gtk/spice-widget.c
+++ b/gtk/spice-widget.c
@@ -2341,6 +2341,9 @@ static void cursor_invalidate(SpiceDisplay *display)
     double s;
     int x, y;
 
+    if (!gtk_widget_get_realized (GTK_WIDGET(display)))
+        return;
+
     if (d->mouse_pixbuf == NULL)
         return;
 
-- 
2.3.0

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