Remove a couple of tp_xxx fields that you are not expected to

initialize (or use or even know about :-).

Modules/xxmodule.c

@@ -138,11 +138,6 @@ statichere PyTypeObject Xxo_Type = {
         0,                      /*tp_new*/
         0,                      /*tp_free*/
         0,                      /*tp_is_gc*/
-        0,                      /*tp_bases*/
-        0,                      /*tp_mro*/
-        0,                      /*tp_defined*/
-        0,                      /*tp_subclasses*/
-        0,                      /*tp_weaklist*/
 };
 /* --------------------------------------------------------------------- */