message: move.hpp: use RANGES_BROKEN_CPO_LOOKUP to guard bug workaround
diff: @@ -63,8 +63,7 @@ namespace ranges
  /// \cond
  namespace adl_move_detail
  {
  -#if (defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 5) || defined(_MSC_VER)
  - // Workaround unclassified GCC4 bug
  +#if RANGES_BROKEN_CPO_LOOKUP
  void iter_move(); // unqualified name lookup block
  #endif
  