CC-4831: I18N: Error message of background settings when creating a show is not translated

-fixed

airtime_mvc/application/forms/AddShowStyle.php

@@ -19,9 +19,9 @@ class Application_Form_AddShowStyle extends Zend_Form_SubForm
             'class'      => 'big'
         ))));
 
+        $stringLengthValidator = Application_Form_Helper_ValidationTypes::overrideStringLengthValidator(6, 6);
         $bg->setValidators(array(
-            'Hex',
-            array('stringLength', false, array(6, 6))
+            'Hex', $stringLengthValidator
         ));
 
     // Add show color input
@@ -39,8 +39,7 @@ class Application_Form_AddShowStyle extends Zend_Form_SubForm
         ))));
 
         $c->setValidators(array(
-                'Hex',
-                array('stringLength', false, array(6, 6))
+                'Hex', $stringLengthValidator
         ));
     }