[gtk+] paned: quietly handle missing cursors

[Matthias Clasen <matthiasc src gnome org>]

commit 6181ff255251ce9cde231c6db8c04e4f4bb1d71b
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 27 14:55:13 2016 -0400

    paned: quietly handle missing cursors
    
    The row-/col-resize cursors should really be present, but if they
    aren't we don't need to crash.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771963

 gtk/gtkpaned.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkpaned.c b/gtk/gtkpaned.c
index dbde5bd..8becebd 100644
--- a/gtk/gtkpaned.c
+++ b/gtk/gtkpaned.c
@@ -1689,6 +1689,7 @@ gtk_paned_realize (GtkWidget *widget)
                            GDK_ENTER_NOTIFY_MASK |
                            GDK_LEAVE_NOTIFY_MASK |
                            GDK_POINTER_MOTION_MASK);
+  attributes.cursor = NULL;
   attributes_mask = GDK_WA_X | GDK_WA_Y;
   if (gtk_widget_is_sensitive (widget))
     {
@@ -1701,8 +1702,7 @@ gtk_paned_realize (GtkWidget *widget)
   priv->handle = gdk_window_new (window,
                                  &attributes, attributes_mask);
   gtk_widget_register_window (widget, priv->handle);
-  if (attributes_mask & GDK_WA_CURSOR)
-    g_object_unref (attributes.cursor);
+  g_clear_object (&attributes.cursor);
 
   priv->child1_window = gtk_paned_create_child_window (paned, priv->child1);
   priv->child2_window = gtk_paned_create_child_window (paned, priv->child2);