Update PropelParamConverter.php

Some Bundle can change the original route name in collection. This happen after I use jms/i18n-routing-bundle. This bundle change original route collection name with locale. Example: en__US__route_name.

FatalErrorException: Error: Call to a member function getOption() on a non-object in /var/www/symfony2/project/vendor/propel/propel-bundle/Propel/PropelBundle/Request/ParamConverter/PropelParamConverter.php line 99