In case anyone's curious, It was a bad idea :)
It compiled and seemed to work fine until it tried to return a result and
instead evaluated (result).
There was a way to fix it where my letfn' macro dealt with the name and
body separately.
But I ended up defining functions on their own and using
letfn assumes fnspecs are all already properly shaped, like: (fn-name
[args] body)
But it is possible that a macroexpansion is needed to get them in the right
shape before letfn does its work, especially if the user found all his
fnspecs were of similar shape and used a macro to eliminate boile
