Function eraApco13_safe 

pub fn eraApco13_safe(
    utc1: f64,
    utc2: f64,
    dut1: f64,
    elong: f64,
    phi: f64,
    hm: f64,
    xp: f64,
    yp: f64,
    phpa: f64,
    tc: f64,
    rh: f64,
    wl: f64,
    astrom: &mut eraASTROM,
) -> ErfaResult<(f64, i32)>