Fix two bugs for blank voice (empty speech): (#1403)

jianganghan

2024-02-29 f272eb4ef78e12a1ef4ae451b114f980a2682d51

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export FUNASR_RUNTIME_ROOT=`pwd`/../
export PATH=$FUNASR_RUNTIME_ROOT/onnxruntime/build/bin:$PWD:$PATH
export LC_ALL=C