[fix] fix empty asr result (#1794)

Xingchen Song(宋星辰)

2024-06-07 93a02feda1848531a48a1794a8de12a962c84a8e

 funasr/models/sense_voice/decoder.py

@@ -360,6 +360,7 @@
        """Score."""
        ys_mask = subsequent_mask(len(ys), device=x.device).unsqueeze(0)
        logp = self.forward(ys.unsqueeze(0), x.unsqueeze(0), cache=state)
        logp = torch.log_softmax(logp, dim=-1)
        return logp.squeeze(0)[-1, :], state