[libxml2] Fix memory leak with XPath namespace nodes

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 6eb0894a96d4d8122e5129e02f78a2b449cc2580
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu May 5 16:49:00 2016 +0200

    Fix memory leak with XPath namespace nodes
    
    Set hasNsNodes to 1 when adding namespace nodes via XP_TEST_HIT.

 result/XPath/tests/nssimple |    8 ++++++++
 test/XPath/tests/nssimple   |    1 +
 xpath.c                     |    1 +
 3 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/result/XPath/tests/nssimple b/result/XPath/tests/nssimple
index 1f3b2ce..8f0dd0e 100644
--- a/result/XPath/tests/nssimple
+++ b/result/XPath/tests/nssimple
@@ -7,6 +7,14 @@ Set contains 1 nodes:
     namespace ns2 href=nsuri2
 
 ========================
+Expression: /doc/elem/namespace::*/self::node()[true()]
+Object is a Node Set :
+Set contains 3 nodes:
+1  namespace xml href=http://www.w3.org/XML/1998/namespace
+2  namespace ns1 href=nsuri1
+3  namespace ns2 href=nsuri2
+
+========================
 Expression: //*[namespace::ns1]
 Object is a Node Set :
 Set contains 2 nodes:
diff --git a/test/XPath/tests/nssimple b/test/XPath/tests/nssimple
index 2b25587..d2a9528 100644
--- a/test/XPath/tests/nssimple
+++ b/test/XPath/tests/nssimple
@@ -1,2 +1,3 @@
 /doc/elem/namespace::node()/..
+/doc/elem/namespace::*/self::node()[true()]
 //*[namespace::ns1]
diff --git a/xpath.c b/xpath.c
index 64dcc5c..620e814 100644
--- a/xpath.c
+++ b/xpath.c
@@ -12398,6 +12398,7 @@ xmlXPathNodeCollectAndTest(xmlXPathParserContextPtr ctxt,
                                if (axis == AXIS_NAMESPACE) {
                                    XP_TEST_HIT_NS
                                } else {
+                                   hasNsNodes = 1;
                                    XP_TEST_HIT
                                }
                                break;