Description:
------------
DOMElement::setIdAttribute() is broken in 5.2.9.  It works properly in 5.2.6.


Reproduce code:
---------------
<?php

    // php_dom_setidattribute_bug.php

    $obj_domDocument = new DOMDocument( );

    $obj_domElement = $obj_domDocument->createElement( 'test', 'This is the root element!' );

    $obj_domElement = $obj_domDocument->appendChild( $obj_domElement );

    $obj_domElement->setAttribute( 'xml:id', 1 );

    $obj_domElement->setIdAttribute( 'xml:id', TRUE );

    print $obj_domDocument->saveXML( );

?>

Expected result:
----------------
This should not throw any exception.

Actual result:
--------------
PHP Fatal error:  Uncaught exception 'DOMException' with message 'Not Found Error' in /home/gwp/bin/php_dom_setidattribute_bug.php:13
Stack trace:
#0 /home/gwp/bin/php_dom_setidattribute_bug.php(13): DOMElement->setIdAttribute('xml:id', true)
#1 {main}
  thrown in /home/gwp/bin/php_dom_setidattribute_bug.php on line 13

Fatal error: Uncaught exception 'DOMException' with message 'Not Found Error' in /home/gwp/bin/php_dom_setidattribute_bug.php:13