fix bug of LfrCmvn

雾聪

2023-11-26 eed40f4f082ac3b30bea36a0e02192b3975c2cf9

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beam_size: 5
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7