message: squash integer sign conversion warning
diff: @@ -126,12 +126,12 @@ namespace ranges
  CONCEPT_REQUIRES(SizedRange<Rng const>())
  constexpr range_size_type_t<Rng> size() const
  {
  - return ranges::size(this->base());
  + return static_cast<range_size_type_t<Rng>>(ranges::size(this->base()));
  }
  CONCEPT_REQUIRES(SizedRange<Rng>())
  RANGES_CXX14_CONSTEXPR range_size_type_t<Rng> size()
  {
  - return ranges::size(this->base());
  + return static_cast<range_size_type_t<Rng>>(ranges::size(this->base()));
  }
  };
  