Fixed NoneType error in the case of no data returned from the API

app.py

@@ -451,7 +451,7 @@ async def summarize(descriptions: list, runtime="normal"):
     # Summarize the descriptions
     summaries = [
         summarizer_pipe(description)
-        if (len(description) > 0 and description != "Null" and description != None)
+        if (description != "Null" and description != None)
         else [{"summary_text": "No summary text is available."}]
         for description in descriptions
     ]