message: fixed an ambiguity involving operator=
diff: @@ -194,7 +194,7 @@ struct StaticArrayBase : ArrayBase<Type_, Derived_> {
  return derived();
  }
  - ENOKI_INLINE Derived &operator=(Scalar value) {
  + ENOKI_INLINE Derived &operator=(const Scalar &value) {
  derived() = Derived(value);
  return derived();
  }
  