patch applied (ghc-6.8/ghc): Fix Trac #1981: seq on a type-family-typed expression

[Ian Lynagh]

Fri Dec 21 00:55:42 PST 2007  simonpj at microsoft.com
  * Fix Trac #1981: seq on a type-family-typed expression
  
  We were crashing when we saw
  	case x of DEFAULT -> rhs
  where x had a type-family type.  This patch fixes it.
  
  MERGE to the 6.8 branch.
  
  

    M ./compiler/stgSyn/CoreToStg.lhs -9 +15