ref: e728678c5061b01ab3484d676c42d562fe70c32b
parent: 225cdef665d14df1b1178f3e735bd5d939e8ab49
author: Jingning Han <jingning@google.com>
date: Tue Dec 9 07:09:36 EST 2014
Refactor update_state_rt Update the frame motion vector only if previous frame motion vector is needed for next frame reference motion vector. Change-Id: Ica50f9d7b46ad4f815bba0d9e30f5546df29546f