Function leptonica_sys::convertToNUpFiles

pub unsafe extern "C" fn convertToNUpFiles(
    dir: *const c_char, 
    substr: *const c_char, 
    nx: l_int32, 
    ny: l_int32, 
    tw: l_int32, 
    spacing: l_int32, 
    border: l_int32, 
    fontsize: l_int32, 
    outdir: *const c_char
) -> l_ok