Math.hypotenuse: Return nil if either a or b is negative
Math.hypotenuse: Return nil if either a or b is negative

nicolasmccurdy/magician-lisp,nicolasmccurdy/magician-lisp,nicolasmccurdy/magician-clojure,nicolasmccurdy/magician-clojure,nicolasmccurdy/magician,nicolasmccurdy/magician-haskell