message: fixup! usize -> u64 or u32
diff: @@ -102,7 +102,7 @@ impl<F: Field> Alphas<F> {
  .unwrap_or_else(|| panic!("constraint {:?} was not registered", ty))
  .clone();
  - if range.1 > num {
  + if num > range.1 {
  panic!(
  "you asked for {num} exponents, but only registered {} for {:?}",
  range.1, ty
  @@ -149,7 +149,7 @@ impl<F: Field> Alphas<F> {
  .unwrap_or_else(|| panic!("constraint {:?} was not registered", ty))
  .clone();
  - if range.1 > num {
  + if num > range.1 {
  panic!(
  "you asked for {num} alphas, but only {} are available for {:?}",
  range.1, ty
  