libxml2::htmlDocDumpMemory() automatically close unclosed tags in HTML

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XML

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parsing

I am using libxml2 in my VS2010 project to generate tree from HTML, find some nodes, modify it and dump tree back to HTML.
The main logic is:

// create parser
htmlParserCtxtPtr parser = htmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL, XML_CHAR_ENCODING_UTF8);
// set parser options
htmlCtxtUseOptions(parser, HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING | HTML_PARSE_NONET);
// parse HTML from pData
htmlParseChunk(parser, pData, dataLen, 0);
// get root node for generated tree
xmlNode* node = xmlDocGetRootElement(parser->myDoc);
// make some changes in tree, e.g. change content for node with name 'title'
// ...
// return back to HTML, result located in 'newHtml'
htmlDocDumpMemory(parser->myDoc, &newHtml, &len);

When I use HTML from http://www.youtube.com/watch?v=S77UrnEGs_g[^] as input data I get one excess in output.

I have checked above URL on http://validator.w3.org/[^] and get error:
Line 562, Column 31: Unclosed element div.

<div class="content">

My question is: could I configure libxml2 so it would not automatically close unclosed tags?