[libxml2] Fix xmllint --xpath node initialization

[Daniel Veillard <veillard src gnome org>]

commit 2e1eaca637ae1f07c5c71829e94012e27a86d88c
Author: Daniel Veillard <veillard redhat com>
Date:   Fri May 25 16:44:20 2012 +0800

    Fix xmllint --xpath node initialization
    
    By default it's more sensible to initialize it to the document itself
    than the root element

 xmllint.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/xmllint.c b/xmllint.c
index 40a2194..3edeccb 100644
--- a/xmllint.c
+++ b/xmllint.c
@@ -2139,7 +2139,7 @@ static void doXPathQuery(xmlDocPtr doc, const char *query) {
         progresult = XMLLINT_ERR_MEM;
         return;
     }
-    ctxt->node = xmlDocGetRootElement(doc);
+    ctxt->node = (xmlNodePtr) doc;
     res = xmlXPathEval(BAD_CAST query, ctxt);
     xmlXPathFreeContext(ctxt);