Description:
------------
http://3v4l.org/53tYG#v5414

If not selected specially, some twin child node shows no attributes when dumping 
the content of the object. This behavior could lead to wrong conclusions when one  
analyzes the visual structure of the xml.

Test script:
---------------
<?php
$xml = new SimpleXMLElement('<root><elements attr="test"><el>test1</el><el>test2</el><el test_attr="123">test3</el></elements></root>');
var_dump(
	$xml,
	$xml->elements->el[2]
);

Expected result:
----------------
I expect to observe twin child node's attributes when dumping the object