ref: d5054504a7ada94fa09557a4e787169e92ac0b16
parent: 1d2aaf58ddbb2bd6d78d02873274ad5bb50feb9a
author: Johann <johannkoenig@google.com>
date: Thu Sep 15 13:44:24 EDT 2016
zero structures completely
Use vp[89]_zero when possible.
Expand the {} set when neither is available or nearby.
Change-Id: Ifc1f46f60100916cd798bf7be3a10f09321c99bd