Function gsl_sys::gsl_odeiv2_control_errlevel

pub unsafe extern "C" fn gsl_odeiv2_control_errlevel(
    c: *mut gsl_odeiv2_control, 
    y: f64, 
    dydt: f64, 
    h: f64, 
    ind: usize, 
    errlev: *mut f64
) -> c_int