[bugfix] create a new senv before allocate a library
[bugfix] create a new senv before allocate a library

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