additional check for drupal routes.

Author: bangpound

EventListener/BootstrapListener.php

@@ -108,7 +108,7 @@ public function onKernelRequestBeforeRouter(GetResponseEvent $event)
         drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 
         $request = $event->getRequest();
-        if (!$request->attributes->get('_drupal', false)) {
+        if (!$request->attributes->get('_drupal', false) && !empty($request->query->get('q', ''))) {
 
             // The 'q' variable is pervasive in Drupal, so it's best to just keep
             // it even though it's very un-Symfony.