Description:
------------
When an empty element has attributes and you loop through them, the isEmptyElement changes from false to true.

Test script:
---------------
<?php
$reader = new XMLReader();
$reader->xml('<?xml version="1.0"?><tr xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<td xsi:nil="true"/><td/>
</tr>', null, LIBXML_COMPACT);
while ($reader->read()) {
	switch ($reader->nodeType)
	{
	case XMLReader::ELEMENT:
		echo "{$reader->name}: " . ($reader->isEmptyElement ? 'empty element' : 'has data');
		$attributes = array();
		if ($reader->hasAttributes) {
			while ($reader->moveToNextAttribute()) {
				$attributes[$reader->localName] = $reader->value;
			}
		}
		echo ($reader->isEmptyElement ? ' = empty element' : ' = has data') . "\n";
		break;
	case XMLReader::END_ELEMENT:
		echo "/{$reader->name}\n";
	}
}


Expected result:
----------------
isEmptyElement = true

Actual result:
--------------
isEmptyElement = false