[gnome-shell] st-widget: Use g_clear_pointer

[Adel Gadllah <agadllah src gnome org>]

commit 4d1358b7ed483b3822ab889e4851cca2c3fa8841
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sun Oct 20 14:00:16 2013 +0200

    st-widget: Use g_clear_pointer
    
    https://bugzilla.gnome.org/show_bug.cgi?id=710541

 src/st/st-widget.c |   19 +++----------------
 1 files changed, 3 insertions(+), 16 deletions(-)
---
diff --git a/src/st/st-widget.c b/src/st/st-widget.c
index 15f45f6..9b1226e 100644
--- a/src/st/st-widget.c
+++ b/src/st/st-widget.c
@@ -338,17 +338,8 @@ st_widget_dispose (GObject *gobject)
   StWidget *actor = ST_WIDGET (gobject);
   StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
 
-  if (priv->theme)
-    {
-      g_object_unref (priv->theme);
-      priv->theme = NULL;
-    }
-
-  if (priv->theme_node)
-    {
-      g_object_unref (priv->theme_node);
-      priv->theme_node = NULL;
-    }
+  g_clear_pointer (&priv->theme, g_object_unref);
+  g_clear_pointer (&priv->theme_node, g_object_unref);
 
   st_widget_remove_transition (actor);
 
@@ -358,11 +349,7 @@ st_widget_dispose (GObject *gobject)
   if (priv->accessible)
     priv->accessible = NULL;
 
-  if (priv->label_actor)
-    {
-      g_object_unref (priv->label_actor);
-      priv->label_actor = NULL;
-    }
+  g_clear_pointer (&priv->label_actor, g_object_unref);
 
   if (priv->texture_file_changed_id != 0)
     {