[ZF-6943]Wrong error message in Zend_Cache_Backend_TwoLevels Exception

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@15931 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Cache/Backend/TwoLevels.php

@@ -132,7 +132,7 @@ class Zend_Cache_Backend_TwoLevels extends Zend_Cache_Backend implements Zend_Ca
             Zend_Cache::throwException('slow_backend must implement the Zend_Cache_Backend_ExtendedInterface interface');
         }
         if (!in_array('Zend_Cache_Backend_ExtendedInterface', class_implements($this->_fastBackend))) {
-            Zend_Cache::throwException('slow_backend must implement the Zend_Cache_Backend_ExtendedInterface interface');
+            Zend_Cache::throwException('fast_backend must implement the Zend_Cache_Backend_ExtendedInterface interface');
         }
         $this->_slowBackend->setDirectives($this->_directives);
         $this->_fastBackend->setDirectives($this->_directives);