patch applied (ghc): Fix simplifier thrashing

[Simon Peyton Jones]

Thu Apr  3 15:38:19 PDT 2008  simonpj at microsoft.com
  * Fix simplifier thrashing
  
  Another example of the simplifier thrashing, getting nowhere.
  See SimplUtils, Note [Unsaturated functions]
  
  There's a test at eyeball/inline4.hs
  

    M ./compiler/simplCore/SimplUtils.lhs -2 +20