fix loss normalization for ddp training

haoneng.lhn

2023-12-08 ace42e5043be992c3a324fc637ba0594f10ad3b6

 funasr/bin/lm_inference_launch.py

@@ -183,6 +183,7 @@
            dtype=dtype,
            batch_size=batch_size,
            key_file=key_file,
            preprocess_fn=preprocessor,
            num_workers=num_workers,
        )