update benz (remove type-punning)
update benz (remove type-punning)

koba-e964/picrin,dcurrie/picrin,leavesbnw/picrin,ktakashi/picrin,picrin-scheme/picrin,ktakashi/picrin,koba-e964/picrin,leavesbnw/picrin,koba-e964/picrin,leavesbnw/picrin,omasanori/picrin,dcurrie/picrin,ktakashi/picrin,picrin-scheme/picrin,omasanori/picrin