Update autoround.py

Author: mengniwang95

neural_compressor/torch/algorithms/weight_only/autoround.py

@@ -268,6 +268,7 @@ def convert(self, model: torch.nn.Module, *args, **kwargs):
         if tokenizer is not None:
             delattr(model.orig_model, "tokenizer")
         elif pipe is None:
+            tokenizer = "Placeholder"
             self.dataset = CapturedDataloader(model.args_list, model.kwargs_list)
         model = model.orig_model
         if pipe is not None: