Update pydantic_ai_slim/pydantic_ai/models/openai.py

Author: DouweM

pydantic_ai_slim/pydantic_ai/models/openai.py

@@ -1171,6 +1171,7 @@ async def _get_event_iterator(self) -> AsyncIterator[ModelResponseStreamEvent]:
             except IndexError:
                 continue
 
+            # When using Azure OpenAI and an async content filter is enabled, the openai SDK can return None deltas.
             if choice.delta is None:  # pyright: ignore[reportUnnecessaryComparison]
                 continue