patch applied (cabal): Define bracketOnError in compat; fixes the build for GHC 6.4

[Ian Lynagh]

Tue May 13 17:39:19 PDT 2008  Ian Lynagh <igloo at earth.li>
  * Define bracketOnError in compat; fixes the build for GHC 6.4

    A ./Distribution/Compat/Exception.hs
    M ./Distribution/Simple/Utils.hs -1 +2

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080514003919-3fd76-c86be2148b7b0f31806b5623221a2941a334e4b9.gz