patch applied (packages/base): Must import ExitCode for its instance to be re-exported.

[Ross Paterson]

On Wed, Aug 13, 2008 at 06:01:47AM -0700, Malcolm Wallace wrote:
> Wed Aug 13 05:57:10 PDT 2008  Malcolm.Wallace at cs.york.ac.uk
>   * Must import ExitCode for its instance to be re-exported.
>   The Cabal library depends on "instance Exception ExitCode", and expects
>   to import it from Control.Exception, not Control.Exception.Base.
> 
>     M ./Control/Exception.hs +7

But Control.Exception imports Control.Exception.Base.
Is this another nhc98 thing?