alphagov/whitehall — pull request #1770 by tekin (2014-10-09 15:51:09+00:00)
Title: Handle nil topics in stats announcements filter

More Errbit exception squashing. Requests are coming in with the `topics` param set to nil: https://errbit.production.alphagov.co.uk/apps/53020d6c0da11585f10000e7/problems/542accec0da115f3290009cb?notice=4