message: quench a minor build system warning
  [[ci skip]]
diff: @@ -32,7 +32,7 @@ ENOKI_TEST_FLOAT(test02_frexp) {
  Value f = std::frexp(Value(i), &e);
  T e2, f2;
  std::tie(f2, e2) = frexp(T(Value(i)));
  - assert(T(Value(e)) == e2 + 1);
  + assert(T(Value(e)) == e2 + 1.f);
  assert(T(f) == f2);
  }
  