message: fix OSX regression
diff: @@ -25,8 +25,8 @@ ScalarMacroFunction::ScalarMacroFunction(void) : MacroFunction(MacroType::SCALAR
  }
  unique_ptr<MacroFunction> ScalarMacroFunction::Copy() {
  - auto result = make_unique<ScalarMacroFunction>(move(expression->Copy()));
  - // result->expression=expression->Copy();
  + auto result = make_unique<ScalarMacroFunction>();
  + result->expression=expression->Copy();
  CopyProperties(*result);
  return move(result);
  