[moses-smt/mosesdecoder] d5c286: Fix slow backoff lookup skip path

[GitHub <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/moses-smt/mosesdecoder
  Commit: d5c2868f9787a85e91328de0580c57c00f2ab1fe
      https://github.com/moses-smt/mosesdecoder/commit/d5c2868f9787a85e91328de0580c57c00f2ab1fe
  Author: Kenneth Heafield <khe...@cl...u.local>
  Date:   2012-07-16 (Mon, 16 Jul 2012)

  Changed paths:
    M lm/model.cc

  Log Message:
  -----------
  Fix slow backoff lookup skip path