bug 824976, don't use `for each` in clusterer, r=peterbe
bug 824976, don't use `for each` in clusterer, r=peterbe

Pike/elmo,AdrianGaudebert/elmo,mozilla/elmo,AdrianGaudebert/elmo,Pike/elmo,mozilla/elmo,mozilla/elmo,Pike/elmo,AdrianGaudebert/elmo,Pike/elmo,mozilla/elmo