[libxml2] Fix XPath expressions of the form '@ns:*'

[Nick Wellnhofer <nwellnhof src gnome org>]

commit e8de99f90cde4832065d7a87d74393a46c191d0b
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Aug 5 01:26:25 2013 +0200

    Fix XPath expressions of the form '@ns:*'
    
    Use namespace for match-all queries on the attribute axis.

 xpath.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/xpath.c b/xpath.c
index 09adb00..b4cdcdc 100644
--- a/xpath.c
+++ b/xpath.c
@@ -12425,7 +12425,14 @@ xmlXPathNodeCollectAndTest(xmlXPathParserContextPtr ctxt,
                     if (axis == AXIS_ATTRIBUTE) {
                         if (cur->type == XML_ATTRIBUTE_NODE)
                        {
-                           XP_TEST_HIT
+                            if (prefix == NULL)
+                           {
+                               XP_TEST_HIT
+                            } else if ((cur->ns != NULL) &&
+                               (xmlStrEqual(URI, cur->ns->href)))
+                           {
+                               XP_TEST_HIT
+                            }
                         }
                     } else if (axis == AXIS_NAMESPACE) {
                         if (cur->type == XML_NAMESPACE_DECL)