message: Fix name of alias type trait
diff: @@ -721,7 +721,7 @@ template <typename T>
  using HasTrivialCopyCtor = ::std::has_trivial_copy_constructor<T>;
  #else
  template <typename T>
  -using HasTrivialCopyCtor = ::std::is_trivially_default_constructible<T>;
  +using HasTrivialDefaultCtor = ::std::is_trivially_default_constructible<T>;
  template <typename T>
  using HasTrivialCopyCtor = ::std::is_trivially_copy_constructible<T>;
  #endif
  