[HttpKernel] fix deprecation notice for Kernel::init()

Author: nicolas-grekas

Kernel.php

@@ -85,15 +85,20 @@ public function __construct($environment, $debug)
             $this->startTime = microtime(true);
         }
 
-        $this->init();
+        $defClass = new \ReflectionMethod($this, 'init');
+        $defClass = $defClass->getDeclaringClass()->name;
+
+        if (__CLASS__ !== $defClass) {
+            trigger_error(sprintf('Calling %s::init() was deprecated in Symfony 2.3 and will be removed in 3.0. Move your logic to the constructor instead.', $defClass), E_USER_DEPRECATED);
+            $this->init();
+        }
     }
 
     /**
      * @deprecated Deprecated since version 2.3, to be removed in 3.0. Move your logic in the constructor instead.
      */
     public function init()
     {
-        trigger_error('The Kernel::init() method was deprecated in version 2.3 and will be removed in 3.0. Move your logic to the constructor instead.', E_USER_DEPRECATED);
     }
 
     public function __clone()

Tests/DataCollector/ConfigDataCollectorTest.php

@@ -69,10 +69,6 @@ public function registerBundles()
     {
     }
 
-    public function init()
-    {
-    }
-
     public function getBundles()
     {
         return array();