bug 1044761, don't remove trees twice, rs=sparky
bug 1044761, don't remove trees twice, rs=sparky

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