Add PyObject_Not().
diff --git a/Include/object.h b/Include/object.h
index f2a83d7..18cca9f 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -271,6 +271,7 @@
extern int PyObject_HasAttr Py_PROTO((PyObject *, PyObject *));
extern long PyObject_Hash Py_PROTO((PyObject *));
extern int PyObject_IsTrue Py_PROTO((PyObject *));
+extern int PyObject_Not Py_PROTO((PyObject *));
extern int PyCallable_Check Py_PROTO((PyObject *));
extern int PyNumber_Coerce Py_PROTO((PyObject **, PyObject **));
extern int PyNumber_CoerceEx Py_PROTO((PyObject **, PyObject **));