Add require_once for Zend_Cache class - fixes ZF-9239

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@21162 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Cache/Manager.php

@@ -22,6 +22,9 @@
 /** @see Zend_Cache_Exception */
 require_once 'Zend/Cache/Exception.php';
 
+/** @see Zend_Cache */
+require_once 'Zend/Cache.php';
+
 /**
  * @category   Zend
  * @package    Zend_Cache