404 error from groups_controller.rb when works = 0

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See issue #165 for people_controller.rb. Same problem, but for Groups that
have People with 0 works.
Use 
  if work_count > 0
  ...
  end
to wrap the Google Chart and keyword stuff under before :show block and the
error goes away.

Original issue reported on code.google.com by stirnam...@gmail.com on 4 Jun 2010 at 5:15

google-code-export / bibapp

404 error from groups_controller.rb when works = 0 #166