From: Daniel Veillard <veillard@redhat.com>
Date: Sat, 3 Aug 2013 22:25:13 +0800
Subject: Clear up a potential NULL dereference

https://bugzilla.gnome.org/show_bug.cgi?id=705399

if ctxt->node_seq.buffer is null then ctxt->node_seq.maximum ought
to be zero but it's better to clarify the check in the code directly.
---
 parserInternals.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/parserInternals.c b/parserInternals.c
index f8a7041..98a5836 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -1990,7 +1990,8 @@ xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,
 
     /* Otherwise, we need to add new node to buffer */
     else {
-        if (ctxt->node_seq.length + 1 > ctxt->node_seq.maximum) {
+        if ((ctxt->node_seq.length + 1 > ctxt->node_seq.maximum) ||
+	    (ctxt->node_seq.buffer == NULL)) {
             xmlParserNodeInfo *tmp_buffer;
             unsigned int byte_size;