toolitemgroup: Fix the previous change

dispose can be called more than once.

diff --git a/gtk/gtktoolitemgroup.c b/gtk/gtktoolitemgroup.c
index 6d783788dc560e2ab0336f5aa86310f71882bcb8..1b734b55b70ca03bcffa34bb25b702125f6c2d2d 100644 (file)
--- a/gtk/gtktoolitemgroup.c
+++ b/gtk/gtktoolitemgroup.c
@@ -523,7 +523,8 @@ gtk_tool_item_group_dispose (GObject *object)
     }
 
   g_clear_object (&priv->settings);
-  gtk_widget_destroy (priv->header);
+  if (priv->header)
+    gtk_widget_destroy (priv->header);
   g_clear_object (&priv->header);
 
   G_OBJECT_CLASS (gtk_tool_item_group_parent_class)->dispose (object);