Fixed fatal error class not found in unit tests (typo)

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@20448 44c647ce-9c0f-0410-b52a-842ac1e357ba

tests/Zend/JsonTest.php

@@ -711,7 +711,7 @@ class Zend_JsonTest extends PHPUnit_Framework_TestCase
         }
 
         Zend_Json::$useBuiltinEncoderDecoder = true;
-        $this->assertEquals("[1.20, 1.68]", Zend_Json_Encode::encode(array(
+        $this->assertEquals("[1.20, 1.68]", Zend_Json_Encoder::encode(array(
             (float)"1,20", (float)"1,68"
         )));
     }