[TYPO3-commerce] commerce-0.13.0 fatal php error with fe_users

[typo3 at jbweb.dk]

typo3-4.5.2
commerce-0.13.0

If FE login in effect going to "checkout" produce following error:

Fatal error: Cannot access protected property
tx_commerce_pi4::$templateCode in
typo3conf/ext/commerce/pi3/class.tx_commerce_pi3.php on line 448

Code in commerce/pi4/class.tx_commerce_pi4.php

protected $templateCode = '';

If replaced to

public $templateCode = '';

checkout works as expected.

Bug or am I doing it wrong?


Regards
Jonas