message: fix visitBlock_declarative_item in non debug mode
diff: @@ -178,8 +178,8 @@ void BlockDeclarationParser::visitBlock_declarative_item(
  "ArchParser.visitGroup_template_declaration", gtd);
  return;
  }
  -#ifndef NDEBUG
  auto gd = ctx->group_declaration();
  +#ifndef NDEBUG
  assert(gd);
  #endif
  NotImplementedLogger::print("ArchParser.visitGroup_declaration", gd);
  