mozilla/zamboni — pull request #2037 by mstriemer (2014-05-08 19:11:23+00:00)
Title: check provider count when creating AccountListFormSet (bug 1007729)

https://bugzilla.mozilla.org/show_bug.cgi?id=1007729

This will check the length of `PAYMENT_PROVIDERS` when creating an `AccountListFormSet` instead of at start-up.