[GHC] #3524: Add mfilter to Control.Monad

[GHC]

#3524: Add mfilter to Control.Monad
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    Reporter:  JonFairbairn      |        Owner:              
        Type:  proposal          |       Status:  new         
    Priority:  normal            |    Milestone:  6.14.1      
   Component:  libraries/base    |      Version:  6.10.4      
    Keywords:                    |   Difficulty:  Unknown     
          Os:  Unknown/Multiple  |     Testcase:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Changes (by merehap):

 * cc: merehap@… (added)
  * failure:  => None/Unknown


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3524#comment:4>
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