Update app.py

catch openai image request returns empty list

app.py

@@ -452,6 +452,9 @@ def make_image(prompt, user, pwd):
         except Exception as ex:
             msg = ex.message
             return [gr.Image(visible=False, value=None), msg]
+        if len(response.data) == 0:
+            msg = "OpenAI returned no image data"
+            return [gr.Image(visible=False, value=None), msg]
         try:
             image_data = response.data[0].b64_json 
             with Image.open(BytesIO(base64.b64decode(image_data))) as image: