edx/edx-platform — pull request #4003 by pmitros (2014-06-05 20:42:03+00:00)
Title: Fix case where DB gets populated with string None

There's a funny code path where there is a string 'None' here sometimes. This unbreaks it. I don't know the code around this very well, so a sanity check would be nice. @dianakhuang @flowerhack