Fix case where pad_max_length set to None (#1729)

Signed-off-by: Ella Charlaix <[email protected]>

Author: echarlaix

neural_compressor/adaptor/torch_utils/gptq.py

@@ -248,7 +248,7 @@ def __init__(
 
         # dataloader
         self.use_max_length = use_max_length
-        self.pad_max_length = pad_max_length
+        self.pad_max_length = pad_max_length or 2048
         self.dataloader_original = dataloader
         self.dataloader = []
         self.nsamples = nsamples