Function oscore_msg_native_optiter_next

#[no_mangle]
pub extern "C" fn oscore_msg_native_optiter_next(
    _: oscore_msg_native_t,
    iter: &mut oscore_msg_native_optiter_t,
    option_number: &mut u16,
    value: &mut *const u8,
    value_len: &mut usize,
) -> bool