[Cache] Fix trigger_error

Author: jderusse

src/Symfony/Component/Cache/Traits/MemcachedTrait.php

@@ -73,11 +73,11 @@ public static function createConnection($servers, array $options = array())
         } elseif (!is_array($servers)) {
             throw new InvalidArgumentException(sprintf('MemcachedAdapter::createClient() expects array or string as first argument, %s given.', gettype($servers)));
         }
+        if (!static::isSupported()) {
+            throw new CacheException('Memcached >= 2.2.0 is required');
+        }
         set_error_handler(function ($type, $msg, $file, $line) { throw new \ErrorException($msg, 0, $type, $file, $line); });
         try {
-            if (!static::isSupported()) {
-                throw new trigger_error('Memcached >= 2.2.0 is required');
-            }
             $options += static::$defaultClientOptions;
             $client = new \Memcached($options['persistent_id']);
             $username = $options['username'];