patch applied (cabal): Fix deadlocks when calling waitForProcess; GHC trac #3542

[Ian Lynagh]

Mon Sep 28 10:45:53 PDT 2009  Ian Lynagh <igloo at earth.li>
  * Fix deadlocks when calling waitForProcess; GHC trac #3542
  We now wait on MVars indicating that stdout and stderr have been
  closed before making the waitForProcess call.

    M ./Distribution/Simple/Utils.hs -7 +22

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20090928174553-3fd76-631ace5f408601373467eb6fdfd09bc5d60039ae.gz