trunk: bugfix, replace sanity check on lattice structure to the very input,...

trunk: bugfix, replace sanity check on lattice structure to the very input, where the lattice should be deterministic and epsilon-free


git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@3472 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8