message: expose pows function
diff: @@ -307,7 +307,7 @@ enum EvalResult<'a, F: FftField> {
  }
  // x^0, ..., x^{n - 1}
  -fn pows<F: Field>(x: F, n : usize) -> Vec<F> {
  +pub fn pows<F: Field>(x: F, n : usize) -> Vec<F> {
  if n == 0 {
  return vec![F::one()];
  } else if n == 1 {
  