[gtk+] label: Don't crash when a builder file contains unknown attributes

[Benjamin Otte <otte src gnome org>]

commit 187f91eb90d15c14ffed03bfedbff457508a98ec
Author: Benjamin Otte <otte redhat com>
Date:   Mon Apr 25 01:34:27 2011 +0200

    label: Don't crash when a builder file contains unknown attributes

 gtk/gtklabel.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index 45531d8..2fb4dc9 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -1531,11 +1531,12 @@ pango_start_element (GMarkupParseContext *context,
 	}
 
       attr = attribute_from_text (data->builder, name, value, error);
-      attr->start_index = start_val;
-      attr->end_index   = end_val;
 
       if (attr)
 	{
+          attr->start_index = start_val;
+          attr->end_index   = end_val;
+
 	  if (!data->attrs)
 	    data->attrs = pango_attr_list_new ();