zendframework/zf2 — pull request #3102 by dasonntag (2012-11-29 11:23:00+00:00)
Title: Don't add a checksum to valid EAN13 barcode

This prevents appending another 0 character at a barcode before
it will get rendered. This way the barcode validator does not claim
a former perfectly valid barcode would be longer than 13 characters.

@see \Zend\Barcode\Object\AbstractObject::validateSpecificText