Enhance tokenizer saving (#1057)

Author: mengniwang95

auto_round/compressors/base.py

@@ -3006,7 +3006,7 @@ def save_quantized(
         if format == "fake" or format == "qdq":  # TODO fix act quantization later
             self.model = self.model.to("cpu")
             self.model.save_pretrained(output_dir)
-            if self.tokenizer is not None:
+            if self.tokenizer is not None and hasattr(self.tokenizer, "save_pretrained"):
                 self.tokenizer.save_pretrained(output_dir)
             processor = kwargs.get("processor", None)
             if processor is not None: