darcs patch: more portabilization

[Isaac Dupree]

Isaac Dupree wrote:
> Isaac Dupree wrote:
>> oh, darnit, you wanted to panic for invalid FastBools... which seems 
>> reasonable and hard to work around.
> 
> although if they're really supposed to be Fast, I question putting any 
> extra checks than "is it equal to zero or not" for example, even to 
> panic.  chr# doesn't do checks the way Data.Char.chr does, so my fastChr 
> doesn't do checks either, so that my patch would preserve GHC's speed. 
> In fact that might make FastBool slower than Bool... maybe FastBool is 
> not needed anyway and can be eliminated from the few places it's used?

okay, I'll do #ifdef DEBUG for the FastBool checks and leave it in a 
separate module (I will make sure there are no warnings in either case!)

~Isaac