Function t42_encode_image_complete 

pub unsafe extern "C" fn t42_encode_image_complete(
    s: *mut t42_encode_state_t,
) -> c_int

\brief Check if we are at the end of the current document page. \param s The T.42 context. \return 0 for more data to come. SIG_STATUS_END_OF_DATA for no more data.