Get rid of most of the flags (in tp_flags) that keep track of various
variations of the type struct and its attachments.  In Py3k, all type
structs have to have all fields -- no binary backwards compatibility.
Had to change the complex object to a new-style number!
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 0f7572f..a4a43ed 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -2073,7 +2073,7 @@
 	/* softspace is writable:  we must supply tp_setattro */
 	PyObject_GenericSetAttr,		/* tp_setattro */
 	0,					/* tp_as_buffer */
-	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
+	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
 	file_doc,				/* tp_doc */
 	0,					/* tp_traverse */
 	0,					/* tp_clear */