Code refactoring, #16

git-svn-id: svn+ssh://code.netmonsters.ru/svn/majestic/branches/evo@114 4cb57b5f-5bbd-dd11-951b-001d605cbbc5

Config.php

@@ -14,18 +14,19 @@ class Config extends ArrayObject
     
     private static $_instance = null;
     
-    
     public function __construct($config = array())
     {
         parent::__construct($config, ArrayObject::ARRAY_AS_PROPS);
     }
     
+    private function __clone(){}
+    
     /**
      * @return Config
      */
     static public function getInstance()
     {
-        if (is_null(self::$_instance)) {
+        if (! isset(self::$_instance)) {
             self::$_instance = new Config();
         }
         return self::$_instance;
@@ -47,7 +48,6 @@ class Config extends ArrayObject
         }
         self::getInstance()->offsetSet($name, $value);
     }
-    
 }
 
 class ConfigArray extends ArrayObject