[commit: base] master: Fix build. (d900345)

[Austin Seipp]

Repository : ssh://darcs.haskell.org//srv/darcs/packages/base

On branch  : master

https://github.com/ghc/packages-base/commit/d9003451d195bdf1cdff6f8424e74d69ee142d79

>---------------------------------------------------------------

commit d9003451d195bdf1cdff6f8424e74d69ee142d79
Author: Austin Seipp <aseipp at pobox.com>
Date:   Thu Jul 11 13:25:11 2013 -0500

    Fix build.
    
    We forgot to import tryAtomicReadMVar.
    
    Signed-off-by: Austin Seipp <aseipp at pobox.com>

>---------------------------------------------------------------

 Control/Concurrent/MVar.hs |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/Control/Concurrent/MVar.hs b/Control/Concurrent/MVar.hs
index 62a9161..0b3a081 100644
--- a/Control/Concurrent/MVar.hs
+++ b/Control/Concurrent/MVar.hs
@@ -157,7 +157,8 @@ import Hugs.ConcBase ( MVar, newEmptyMVar, newMVar, takeMVar, putMVar,
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.MVar ( MVar(..), newEmptyMVar, newMVar, takeMVar, putMVar,
-                  tryTakeMVar, tryPutMVar, isEmptyMVar, atomicReadMVar
+                  tryTakeMVar, tryPutMVar, isEmptyMVar, atomicReadMVar,
+                  tryAtomicReadMVar
                 )
 import qualified GHC.MVar
 import GHC.Weak