need to check if the user enabled the clean url or not before using the drupal_add_feed

In line 170 : the developer used drupal_add_feed function without checking if the user enabled the clean_url or not .. he assumed it is enabled by default which raise error when trying to get it with no clean url enabled ..
i did found a solution for that by checking if clean url is enabled by changing the line 170 to :

if (!variable_get("clean_url",0)){
		    $feedlink = "?q=article/feed";
	    }else{
		    $feedlink = "article/feed";
	    }
      $feed = drupal_add_feed($feedlink, t('Articles'));

Thanks~