Backed out Reify() signature change.
diff --git a/python/repeated.h b/python/repeated.h
index ec2ac16..de81b2b 100644
--- a/python/repeated.h
+++ b/python/repeated.h
@@ -48,7 +48,8 @@
PyObject* arena);
// Reifies a repeated field stub to point to the concrete data in `arr`.
-upb_array* PyUpb_RepeatedContainer_Reify(PyObject* self, upb_array* arr);
+// If `arr` is NULL, an appropriate empty array will be constructed.
+void PyUpb_RepeatedContainer_Reify(PyObject* self, upb_array* arr);
// Reifies this repeated object if it is not already reified.
upb_array* PyUpb_RepeatedContainer_EnsureReified(PyObject* self);
