Fix ignore warning

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. "