patch applied (packages/base): avoid a space leak building up in the "prodding" IORef (part of #2992)

[Simon Marlow]

Wed Mar 11 02:39:38 PDT 2009  Simon Marlow <marlowsd at gmail.com>
  * avoid a space leak building up in the "prodding" IORef (part of #2992)

    M ./GHC/Conc.lhs -1 +2

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20090311093938-12142-6962b7182e5e11d549fc83f84f428e6e5d22a2a9.gz