pub unsafe extern "C" fn ffgsvb( fptr: *mut fitsfile, colnum: c_int, naxis: c_int, naxes: *mut c_long, blc: *mut c_long, trc: *mut c_long, inc: *mut c_long, nulval: c_uchar, array: *mut c_uchar, anynul: *mut c_int, status: *mut c_int) -> c_int