[libxml2] Disallow namespace nodes in XPointer points

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 3f8a91036d338e51c059d54397a42d645f019c65
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Tue Jun 28 15:55:09 2016 +0200

    Disallow namespace nodes in XPointer points

 xpointer.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/xpointer.c b/xpointer.c
index d74174a..a7b03fb 100644
--- a/xpointer.c
+++ b/xpointer.c
@@ -1833,8 +1833,8 @@ xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
                case XPATH_RANGE: {
                    xmlNodePtr node = tmp->user;
                    if (node != NULL) {
-                       if (node->type == XML_ATTRIBUTE_NODE) {
-                           /* TODO: Namespace Nodes ??? */
+                       if ((node->type == XML_ATTRIBUTE_NODE) ||
+                            (node->type == XML_NAMESPACE_DECL)) {
                            xmlXPathFreeObject(obj);
                            xmlXPtrFreeLocationSet(newset);
                            XP_ERROR(XPTR_SYNTAX_ERROR);
@@ -1929,8 +1929,8 @@ xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
                case XPATH_RANGE: {
                    xmlNodePtr node = tmp->user2;
                    if (node != NULL) {
-                       if (node->type == XML_ATTRIBUTE_NODE) {
-                           /* TODO: Namespace Nodes ??? */
+                       if ((node->type == XML_ATTRIBUTE_NODE) ||
+                            (node->type == XML_NAMESPACE_DECL)) {
                            xmlXPathFreeObject(obj);
                            xmlXPtrFreeLocationSet(newset);
                            XP_ERROR(XPTR_SYNTAX_ERROR);