Bugfix for QuickCheck 1.1.0.0

[Don Stewart]

patperry:
> The version of QuickCheck in GHC-6.10 fixes a bug in the version  
> bundled with GHC-6.8.  Both versions of the library claim to be  
> Quickcheck-1.1.0.0.  Should someone bump the version number?
> 
> Patrick
> 
> This is the last time I bother anybody about this.  This whole process  
> has been far too painful.

The bumping of extralibs prior to the RC would have been useful, but it
isn't a showstopper for testing.

-- Don