Constant python3_sys::PyModuleDef_INIT

pub const PyModuleDef_INIT: PyModuleDef = PyModuleDef{m_base: PyModuleDef_HEAD_INIT,
            m_name: 0 as *const _,
            m_doc: 0 as *const _,
            m_size: 0,
            m_methods: 0 as *mut _,
            m_slots: 0 as *mut _,
            m_traverse: None,
            m_clear: None,
            m_free: None,}