[gtk+/gtk-3-18] tool item group: Don't leak a button

[Matthias Clasen <matthiasc src gnome org>]

commit c9b69f7c3906b8b48f7eb2daae0c7958f9b44778
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 27 11:07:53 2015 -0400

    tool item group: Don't leak a button
    
    This causes a hickup in the new css node machinery, causing
    the default-value test to fail.

 gtk/gtktoolitemgroup.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtktoolitemgroup.c b/gtk/gtktoolitemgroup.c
index 719ccff..1b734b5 100644
--- a/gtk/gtktoolitemgroup.c
+++ b/gtk/gtktoolitemgroup.c
@@ -495,11 +495,7 @@ gtk_tool_item_group_finalize (GObject *object)
 {
   GtkToolItemGroup *group = GTK_TOOL_ITEM_GROUP (object);
 
-  if (group->priv->children)
-    {
-      g_list_free (group->priv->children);
-      group->priv->children = NULL;
-    }
+  g_list_free (group->priv->children);
 
   G_OBJECT_CLASS (gtk_tool_item_group_parent_class)->finalize (object);
 }
@@ -527,6 +523,9 @@ gtk_tool_item_group_dispose (GObject *object)
     }
 
   g_clear_object (&priv->settings);
+  if (priv->header)
+    gtk_widget_destroy (priv->header);
+  g_clear_object (&priv->header);
 
   G_OBJECT_CLASS (gtk_tool_item_group_parent_class)->dispose (object);
 }