ref: f8f8c6d44c436609a408cf9a8910ccf8b65ca319
parent: 924dc81e7426852d6c447fa10515e59f4f3c19bf
author: Dmitry Kovalev <dkovalev@google.com>
date: Mon Mar 10 06:50:16 EDT 2014
Adding reusable get_y_mode_prob() function. Change-Id: Iebd182d7aeebc0f8964b6fd35057449bb25b00c1