ctc_loss error message bug fix. (#16917)
Summary:
CTCLLoss argument error message is wrong.
Please fix this. (sorry if I made some mistakes.)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16917
Differential Revision: D14019983
Pulled By: ezyang
fbshipit-source-id: 3337a2e86da6f3f7594c73fddb73340494a19ce2
