tree bac00297e970c5aea2d6ff9f41c512a69b8b29fa
parent 0f5c63e4f6fce8e846d799ad60b0c0d1895069f8
author Jim Bankoski <jimbankoski@google.com> 1287087546 -0400
committer Jim Bankoski <jimbankoski@google.com> 1287087546 -0400

safety check to avoid divide by 0s