move debug prints in the VM
move debug prints in the VM

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