Issue #21354: PyCFunction_New function is exposed by python DLL again.

Misc/NEWS

@@ -34,6 +34,8 @@ Core and Builtins
 - Issue #24044: Fix possible null pointer dereference in list.sort in out of
   memory conditions.
 
+- Issue #21354: PyCFunction_New function is exposed by python DLL again.
+
 Library
 -------
 

Objects/methodobject.c

@@ -16,7 +16,7 @@ static int numfree = 0;
 /* undefine macro trampoline to PyCFunction_NewEx */
 #undef PyCFunction_New
 
-PyObject *
+PyAPI_FUNC(PyObject *)
 PyCFunction_New(PyMethodDef *ml, PyObject *self)
 {
     return PyCFunction_NewEx(ml, self, NULL);