[gtk/drag-icon: 4/7] widget: Be more careful with roots

[Matthias Clasen <matthiasc src gnome org>]

commit 9ba184adf7aa599e516fb35daafc79ac7117f0d4
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Dec 30 00:24:32 2019 -0500

    widget: Be more careful with roots
    
    We were assuming that all roots are windows,
    and calling GtkWindow apis on them.

 gtk/gtkwidget.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 6ca66ade93..3d40eee3d1 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -3298,9 +3298,8 @@ update_cursor_on_state_change (GtkWidget *widget)
   GtkRoot *root;
 
   root = _gtk_widget_get_root (widget);
-  if (root)
-    gtk_window_update_pointer_focus_on_state_change (GTK_WINDOW (root),
-                                                     widget);
+  if (GTK_IS_WINDOW (root))
+    gtk_window_update_pointer_focus_on_state_change (GTK_WINDOW (root), widget);
 }
 
 /**