message: add cases for TableRefs that do not need unfolding
diff: @@ -121,6 +121,10 @@ void ExpressionBinder::UnfoldTableRef(ParsedExpression &expr, TableRef &ref, Mac
  tf_ref.function = UnfoldMacroRecursive(move(tf_ref.function), macro_binding);
  break;
  }
  + case TableReferenceType::BASE_TABLE:
  + case TableReferenceType::EMPTY:
  + // there TableRefs do not need to be unfolded
  + break;
  default:
  throw NotImplementedException("TableRef type not implemented for macro's!");
  }
  