patch applied (packages/unix): Avoid using IOError internals

[Ian Lynagh]

Sun Jan  4 09:32:21 PST 2009  Ian Lynagh <igloo at earth.li>
  * Avoid using IOError internals

    M ./System/Posix/IO.hsc -1 +1

View patch online:
http://darcs.haskell.org/packages/unix/_darcs/patches/20090104173221-3fd76-4c0de52575f1e5cd17c1d4fb97dea70b0d457914.gz