[GHC] #9936: Data.Fixed truncates 5.17 to 5.16

[GHC]

#9936: Data.Fixed truncates 5.17 to 5.16
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        Reporter:  singpolyma        |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  libraries/base    |                 Version:  7.6.3
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #9231, #9240      |  Differential Revisions:
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Comment (by simonpj):

 It sounds as if the fix is simple.  It would be great if someone wanted to
 offer a patch for this, with enough comments to explain the subtlety.
 Thanks!

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9936#comment:7>
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