ref: 3430820bbe147ce3266085957b3903b62a388824
parent: 19e32ac7c7df70d5525d22bda784e5373fb9c705
author: Jim Bankoski <jimbankoski@google.com>
date: Sat Nov 27 09:02:59 EST 2010
vp8e - remove unnecessary variance calc only do the variance calculation if necessary ( eg needed for breakout test)