ref: c619f6cb0f16d083a290168c8613f8e506a9fd27
parent: e1a8b6c8d5be343b1952227dae486c5a6c902d36
parent: d4cdb683a48fc25bd3d32f53964023828f13cdbf
author: Yaowu Xu <yaowu@google.com>
date: Mon Apr 18 03:44:33 EDT 2011
Merge "fixed an overflow in ssim calculation"