Fix ignore warning

See https://github.com/THUDM/ChatGLM2-6B/issues/639 and https://github.com/huggingface/transformers/pull/26147.

modeling_chatglm.py

@@ -1115,9 +1115,9 @@ class ChatGLMForConditionalGeneration(ChatGLMPreTrainedModel):
  " recommend using `max_new_tokens` to control the maximum length of the generation.",
  UserWarning,
  )
- elif generation_config.max_new_tokens is not None:
+ elif generation_config.max_new_tokens is not None :
  generation_config.max_length = generation_config.max_new_tokens + input_ids_seq_length
- if not has_default_max_length:
+ if not has_default_max_length and generation_config.max_length is not None:
  logger.warn(
  f"Both `max_new_tokens` (={generation_config.max_new_tokens}) and `max_length`(="
  f"{generation_config.max_length}) seem to have been set. `max_new_tokens` will take precedence. "