ref: a49e77af50c663807721a6cfd757c69cf4b75deb
parent: 25a2740abb59c90f481f170b10397728a54e3550
author: Yaowu Xu <yaowu@google.com>
date: Wed Oct 30 14:06:42 EDT 2013
simplify read_coef_prob() Change-Id: I529c634db4f81ba5386092c126f53312b1e51b2b