[libxslt] Fix memory leak in xsltElementAvailableFunction

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 0620aeefe9c9abac2bc864b20d4a597588589255
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Tue Jan 3 15:51:55 2017 +0100

    Fix memory leak in xsltElementAvailableFunction

 libxslt/functions.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libxslt/functions.c b/libxslt/functions.c
index 5e99e92..ec22203 100644
--- a/libxslt/functions.c
+++ b/libxslt/functions.c
@@ -850,7 +850,7 @@ xsltElementAvailableFunction(xmlXPathParserContextPtr ctxt, int nargs){
 
        name = xmlStrdup(obj->stringval);
        ns = xmlSearchNs(tctxt->inst->doc, tctxt->inst, NULL);
-       if (ns != NULL) nsURI = xmlStrdup(ns->href);
+       if (ns != NULL) nsURI = ns->href;
     } else {
        nsURI = xmlXPathNsLookup(ctxt->context, prefix);
        if (nsURI == NULL) {