patch applied (cabal-branches/cabal-1.4): Hack around lack of Read for Map in GHC 6.4

[Duncan Coutts]

Tue May 13 17:44:00 PDT 2008  Ian Lynagh <igloo at earth.li>
  * Hack around lack of Read for Map in GHC 6.4
  This is made worse by Show on Map being strange in GHC 6.4.
  The code could be better, but it works, and all the ugliness is in
  #if's that we can remove at some point down the line.

    M ./Distribution/PackageDescription/Configuration.hs -1 +31
    M ./Distribution/Simple/PackageIndex.hs +30

View patch online:
http://darcs.haskell.org/cabal-branches/cabal-1.4/_darcs/patches/20080514004400-3fd76-f920b11964c7fcb280b5b6b71203752906c56847.gz