[libxml2] Small fix for previous commit

[Daniel Veillard <veillard src gnome org>]

commit fec31bcd452e77c10579467ca87a785b41115de6
Author: Daniel Veillard <veillard redhat com>
Date:   Thu Nov 18 11:07:24 2010 +0100

    Small fix for previous commit

 xpath.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/xpath.c b/xpath.c
index 1447be5..8b56189 100644
--- a/xpath.c
+++ b/xpath.c
@@ -11765,13 +11765,14 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
 	        xmlXPathObjectPtr tmp;
 		/* pop the result if any */
 		tmp = valuePop(ctxt);
-                if (tmp != contextObj)
+                if (tmp != contextObj) {
                     /*
                      * Free up the result
                      * then pop off contextObj, which will be freed later
                      */
                     xmlXPathReleaseObject(xpctxt, tmp);
                     valuePop(ctxt);
+                }
 		goto evaluation_error;
 	    }