[gtk+] widget: Don't leak the cursor on destruction

[Benjamin Otte <otte src gnome org>]

commit f80a90d39a2eb852cb066e0b03c738a316288891
Author: Benjamin Otte <otte redhat com>
Date:   Mon Nov 6 03:24:34 2017 +0100

    widget: Don't leak the cursor on destruction

 gtk/gtkwidget.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 5d41c2d..b08b987 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -9999,6 +9999,8 @@ gtk_widget_dispose (GObject *object)
   if (_gtk_widget_get_realized (widget))
     gtk_widget_unrealize (widget);
 
+  g_clear_object (&priv->cursor);
+
   if (!priv->in_destruction)
     {
       priv->in_destruction = TRUE;