#014188: [Document] ezcDocumentEzXml::getAsDocbook() returns an ezcDocumentEzXml rather than ezcDocumentDocbook

When converting eZ XML to docbook, the method ezcDocumentEzXml::getAsDocbook() returns an ezcDocumentEzXml rather than ezcDocumentDocbook, which results in an error when trying to use the result elsewhere.

Catchable fatal error: Argument 1 passed to ezcDocumentRst::createFromDocbook() must be an instance of ezcDocumentDocbook, instance of ezcDocumentEzXml given, called in /var/www/test/rstexport.php on line 48 and defined in /usr/share/php/ezc/Document/document/rst.php

Operating System: Ubuntu Linux
PHP Version: (please be specific, like '4.4.3' or '5.1.5') 5.2.6
Database and version:
Browser (and version):