[ZF-9447]: define Zend_Barcode_Object_Code39 :: _codingMap as protected

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@21657 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Barcode/Object/Code39.php

@@ -44,7 +44,7 @@ class Zend_Barcode_Object_Code39 extends Zend_Barcode_Object_ObjectAbstract
      * Coding map
      * @var array
      */
-    private $_codingMap = array(
+    protected $_codingMap = array(
         '0' => '000110100',
         '1' => '100100001',
         '2' => '001100001',