Function leptonica_sys::readHeaderJpeg

pub unsafe extern "C" fn readHeaderJpeg(
    filename: *const c_char, 
    pw: *mut l_int32, 
    ph: *mut l_int32, 
    pspp: *mut l_int32, 
    pycck: *mut l_int32, 
    pcmyk: *mut l_int32
) -> l_ok