Heikki Linnakangas 866a1f0923 Fix calculation of ISMN check digit.
This has always been broken, so back-patch to all supported versions.

Fabien COELHO
2014-01-13 15:43:29 +02:00
..
2014-01-13 15:43:29 +02:00
2014-01-07 16:05:30 -05:00