Function mf_classic_poller_sync_read_value 

pub unsafe extern "C" fn mf_classic_poller_sync_read_value(
    nfc: *mut Nfc,
    block_num: u8,
    key: *mut MfClassicKey,
    key_type: MfClassicKeyType,
    value: *mut i32,
) -> MfClassicError