Update modeling_chatglm.py

Should not get a new attention_mask while images is empty.

modeling_chatglm.py

@@ -976,7 +976,7 @@ class ChatGLMForConditionalGeneration(ChatGLMPreTrainedModel):
         # only last token for input_ids if past is not None
         if position_ids is None:
             position_ids = self.get_position_ids(input_ids, device=input_ids.device)
-        if attention_mask is not None:
+        if attention_mask is not None and not is_empty(images):
             image_size: int = self.config.vision_config['image_size']
             patch_size: int = self.config.vision_config['patch_size']
             num_patches = (image_size // patch_size // 2) ** 2