simplified some calls

src/Silex/Application.php

@@ -292,7 +292,7 @@ class Application extends Container implements HttpKernelInterface, TerminableIn
         $app = $this;
 
         $this->on(KernelEvents::REQUEST, function (GetResponseEvent $event) use ($callback, $app) {
-            if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
+            if (!$event->isMasterRequest()) {
                 return;
             }
 
@@ -318,7 +318,7 @@ class Application extends Container implements HttpKernelInterface, TerminableIn
         $app = $this;
 
         $this->on(KernelEvents::RESPONSE, function (FilterResponseEvent $event) use ($callback, $app) {
-            if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
+            if (!$event->isMasterRequest()) {
                 return;
             }
 

src/Silex/EventListener/LogListener.php

@@ -14,7 +14,6 @@ namespace Silex\EventListener;
 use Psr\Log\LoggerInterface;
 use Psr\Log\LogLevel;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
@@ -55,7 +54,7 @@ class LogListener implements EventSubscriberInterface
      */
     public function onKernelRequest(GetResponseEvent $event)
     {
-        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
+        if (!$event->isMasterRequest()) {
             return;
         }
 
@@ -69,7 +68,7 @@ class LogListener implements EventSubscriberInterface
      */
     public function onKernelResponse(FilterResponseEvent $event)
     {
-        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
+        if (!$event->isMasterRequest()) {
             return;
         }