Function lpsolve_sys::prod_xA

pub unsafe extern "C" fn prod_xA(
    lp: *mut lprec, 
    coltarget: *mut c_int, 
    input: *mut c_double, 
    nzinput: *mut c_int, 
    roundzero: c_double, 
    ofscalar: c_double, 
    output: *mut c_double, 
    nzoutput: *mut c_int, 
    roundmode: c_int
) -> c_int