[Merge] lp:~ralfjung-e/mailman/2.1 into lp:mailman/2.1

[Jim Popovitch]

If line 20 (in the patch below) sets "captcha_idx = 0" python throws an error:

   TypeError: cannot concatenate 'str' and 'int' objects

I think a better solution would be to remove the captcha_idx from that section of code if it is None, (and set it to None at line 20).
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https://code.launchpad.net/~ralfjung-e/mailman/2.1/+merge/368614
Your team Mailman Coders is requested to review the proposed merge of lp:~ralfjung-e/mailman/2.1 into lp:mailman/2.1.