[gtk+] Use g_clear_object in a few more places

[Matthias Clasen <matthiasc src gnome org>]

commit 8db8891c66e9b5dc07deba631f2facc9383b7c2e
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jul 25 08:32:08 2016 -0400

    Use g_clear_object in a few more places

 gtk/gtkwidget.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 8dacf44..a8ad232 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -12272,16 +12272,14 @@ gtk_widget_finalize (GObject *object)
 
   g_free (priv->name);
 
-  if (priv->accessible)
-    g_object_unref (priv->accessible);
+  g_clear_object (&priv->accessible);
 
   gtk_widget_clear_path (widget);
 
   gtk_css_widget_node_widget_destroyed (GTK_CSS_WIDGET_NODE (priv->cssnode));
   g_object_unref (priv->cssnode);
 
-  if (priv->context)
-    g_object_unref (priv->context);
+  g_clear_object (&priv->context);
 
   _gtk_size_request_cache_free (&priv->requests);