From: Daniel Veillard <veillard@redhat.com>
Date: Sat, 8 Feb 2014 02:22:35 +0800
Subject: Fix xmlTextWriterWriteElement when a null content is given

---
 xmlwriter.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/xmlwriter.c b/xmlwriter.c
index d3f29f8..27209b9 100644
--- a/xmlwriter.c
+++ b/xmlwriter.c
@@ -2238,10 +2238,12 @@ xmlTextWriterWriteElement(xmlTextWriterPtr writer, const xmlChar * name,
     if (count == -1)
         return -1;
     sum += count;
-    count = xmlTextWriterWriteString(writer, content);
-    if (count == -1)
-        return -1;
-    sum += count;
+    if (content != NULL) {
+	count = xmlTextWriterWriteString(writer, content);
+	if (count == -1)
+	    return -1;
+	sum += count;
+    }
     count = xmlTextWriterEndElement(writer);
     if (count == -1)
         return -1;