patch applied (cabal): Use relative file paths in .cabal parse error messages

[Duncan Coutts]

Wed Apr  9 08:40:30 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Use relative file paths in .cabal parse error messages
  Do this by normalising the file path in the error message
  and when looking for .cabal files, by looking in '.' rather
  than the absolute path of the current directory.

    M ./Distribution/Simple/Utils.hs -6 +8

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080409154030-adfee-98e35b39ee030d7e865e5e4283af8c27e85cf97e.gz