pub unsafe extern "C" fn ffgtcs( fptr: *mut fitsfile, xcol: c_int, ycol: c_int, xrval: *mut f64, yrval: *mut f64, xrpix: *mut f64, yrpix: *mut f64, xinc: *mut f64, yinc: *mut f64, rot: *mut f64, type_: *mut c_char, status: *mut c_int) -> c_int