ref: 014acfa2af084034daeb01c06ac0c71a0ef39682
parent: 1600707d350f572d6768a9adb57248ba44c29b82
author: Yaowu Xu <yaowu@google.com>
date: Tue Sep 17 12:31:46 EDT 2013
fix integer overflow errors Change-Id: I76f440a917832c02d7a727697b225bac66b99f56