fix bug for cpp msg not return right name

zhaomingwork

2023-05-13 f2e7ea83c9d8b580d09eb31acf6c2fa60e683e3b

 funasr/losses/label_smoothing_loss.py

@@ -97,7 +97,7 @@
        normalize_length=False,
        criterion=nn.NLLLoss(reduction='none'),
    ):
        """Construct an LabelSmoothingLoss object."""
        """Construct an NllLoss object."""
        super(NllLoss, self).__init__()
        self.criterion = criterion
        self.padding_idx = padding_idx