check none instead of falsy

Author: alexander-alderman-webb

sentry_sdk/integrations/pydantic_ai/__init__.py

@@ -103,7 +103,7 @@ def patched_init(self: "Agent[Any, Any]", *args: "Any", **kwargs: "Any") -> None
         kwargs["capabilities"] = caps
 
         metadata = kwargs.get("metadata")
-        if not metadata:
+        if metadata is None:
             kwargs["metadata"] = {}  # Used as shared reference between hooks
 
         return original_init(self, *args, **kwargs)