[moses-smt/mosesdecoder] 32885c: Fix compile error with ancient Boost

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

  Branch: refs/heads/master
  Home:   https://github.com/moses-smt/mosesdecoder
  Commit: 32885c185ee6c6b319fe85bb70ada9c04605f94e
      https://github.com/moses-smt/mosesdecoder/commit/32885c185ee6c6b319fe85bb70ada9c04605f94e
  Author: Kenneth Heafield <gi...@kh...>
  Date:   2012-10-22 (Mon, 22 Oct 2012)

  Changed paths:
    M util/string_piece.hh

  Log Message:
  -----------
  Fix compile error with ancient Boost