fix: msg_stamp.size() is unsigned,should convert to int (#2523)

TouchZZZ

2025-05-22 eccf74684743593950ad259877db7ce9ffc06e93

 examples/industrial_data_pretraining/paraformer_streaming/README_zh.md

@@ -131,7 +131,7 @@

model = AutoModel(model="fsmn-vad")

wav_file = f"{model.model_path}/example/asr_example.wav"
wav_file = f"{model.model_path}/example/vad_example.wav"
res = model.generate(input=wav_file)
print(res)
```