update model.generate

app.py

@@ -340,8 +340,8 @@ def predict(_chatbot, task_history):
     with torch.inference_mode():
         output_ids = model.generate(
             input_ids,
-            images=all_visual_tensor,
-            audios=audio_list,
+            images=all_visual_tensor if all_visual_tensor else None,
+            audios=audio_list if audio_list else None,
             do_sample=False,
             temperature=0.01,
             top_p=None,