Update app.py

app.py

@@ -284,6 +284,7 @@ def evaluate_single_data(model_name, data, client, executor, prompt_template, pr
 def process_message_to_sharegpt_format(message):
     sharegpt_images = []
     sharegpt_conversation = []
+    image_idx = 0
     
     for i, message_item in enumerate(message):
         role = message_item['role']