Fixing broken routing due to missing language parameter.

When a URL to an article is supposed to be generated for another language than the current one, this fails due to Joomla not using the language parameter for ContentHelperRoute::getArticleRoute() right now. This normally rarely happens, since you can only see articles for your current language or for the 'all' language, but when using smart search, you get results for all languages. Due to this bug, the links to non-'all'-language articles are however wrong. This fixes this.

This fix was made possible and is sponsored by Pulsar Informatique: http://www.pulsar-informatique.com/

Thanks for that.