patch applied (cabal): Generalise checkPackageFiles to any monad, not just IO

[Duncan Coutts]

Tue Aug  5 17:15:47 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Generalise checkPackageFiles to any monad, not just IO
  This is to let us use the same checks for virtual or
  in-memory file systems, like tarball contents.

    M ./Distribution/PackageDescription/Check.hs -26 +66
    M ./Distribution/Simple/SrcDist.hs +1

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080806001547-adfee-637fe706a658f3effe30f6c7137f589f950dc57c.gz