fix type promotion TypeError in tensor_utils.py

paddlespeech/audio/utils/tensor_utils.py

@@ -177,8 +177,9 @@ def th_accuracy(pad_outputs: paddle.Tensor,
     Returns:
         float: Accuracy value (0.0 - 1.0).
     """
-    pad_pred = pad_outputs.view(pad_targets.shape[0], pad_targets.shape[1],
-                                pad_outputs.shape[1]).argmax(2)
+    pad_pred = pad_outputs.reshape(
+        [pad_targets.shape[0], pad_targets.shape[1],
+         pad_outputs.shape[1]]).argmax(2)
     mask = pad_targets != ignore_label
     #TODO(Hui Zhang): sum not support bool type
     # numerator = paddle.sum(
@@ -248,7 +249,7 @@ def st_reverse_pad_list(ys_pad: paddle.Tensor,
     #   >>> tensor([[ 2,  1,  0],
     #   >>>         [ 2,  1,  0],
     #   >>>         [ 0, -1, -2]])
-    index = index * seq_mask
+    index = index * seq_mask.astype(index.dtype)
 
     #   >>> index
     #   >>> tensor([[2, 1, 0],