Hum. By the way, PyInit_time() calls PyModule_AddObject() without checking for errors :-/

PyMODINIT_FUNC
PyInit_time(void)
{
    PyObject *m;
    m = PyModule_Create(&timemodule);
    if (m == NULL)
        return NULL;
    ...
    PyModule_AddObject(m, "struct_time", (PyObject*) &StructTimeType);
    ...
    return m;
}

It should have at least one final generic:

    if (PyErr_Occurred()) {
        return -1;
    }