CCK checkboxes still behave as optional

Issue Summary

I installed this module to fix a problem where a checkbox in a content type I had created using the CCK behaved as an optional field even when marked as required. It made no difference at all unfortunately.

I had a look at the code and I've put in a fix. With this new code the checkbox behaves as a required field should but I was unable to find a way to automatically mark it as required (i.e. with the asterisk showing next to the field). I have worked around this in my site by putting the span tag needed at the end of the on description. I've attached a screenshot of the CCK checkbox configuration which I hope will make this a bit clearer.

The patch is against checkbox_validate 6.x-1.1 and I'm running Drupal 6.6

The CCK checkbox field is of a different type to the one in the registration form, I've updated the code to check for this new type and handle it as well.

There was also what looks like a typo in the original code that may have stopped it working for checkboxes in the registration form, there were two parameters being passed into the checkbox_validate_recurse function which only expected one. I've fixed it and the module definitely works for the registration form with this version but I didn't test it before the fix.