matrix accumulation fix
matrix accumulation fix

aalto-speech/AaltoASR,aalto-speech/AaltoASR,kkleino/AaltoASR,kkleino/AaltoASR,phsmit/AaltoASR,aalto-speech/AaltoASR,lingsoft/AaltoASR,lingsoft/AaltoASR,kkleino/AaltoASR,lingsoft/AaltoASR,lingsoft/AaltoASR,phsmit/AaltoASR,aalto-speech/AaltoASR,kkleino/AaltoASR,phsmit/AaltoASR,aalto-speech/AaltoASR,lingsoft/AaltoASR,phsmit/AaltoASR,kkleino/AaltoASR