[bugfix] broken hygiene of cond expression
[bugfix] broken hygiene of cond expression

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