fix NoneType bug for ws_client.py microphone mode

zhaomingwork

2023-05-13 3dcaa9df2f056fefd87736f1cd1cd32679018ba9

 funasr/models/encoder/opennmt_encoders/conv_encoder.py

@@ -67,7 +67,7 @@

class ConvEncoder(AbsEncoder):
    """
    author: Speech Lab, Alibaba Group, China
    Author: Speech Lab of DAMO Academy, Alibaba Group
    Convolution encoder in OpenNMT framework
    """