Cabal and c2hs

[Dominic Steinitz]

Ignore my previous message, it was a lot simpler than I thought it was

> import Distribution.Simple
> import Distribution.Simple.PreProcess
> 
> main = 
>    defaultMainWithHooks 
>       defaultUserHooks {
>          hookedPreProcessors =  
>             [("chs", ppC2hs)]
>       }

Dominic.