patch applied (packages/base): Add Control.Exception.blocked :: IO Bool

[Simon Marlow]

Wed Jul  9 06:31:39 PDT 2008  Simon Marlow <marlowsd at gmail.com>
  * Add Control.Exception.blocked :: IO Bool
  Tells you whether async exceptions are currently blocked or not.

    M ./Control/Exception.hs +3
    M ./GHC/Exception.lhs +6

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20080709133139-12142-147d3b118808f2121f1e2a0619fe6ec1bfe8cb0a.gz