[cvs-nhc98] patch applied (yhc): Fix Yhc.Core.Reachable. Could discard a useful data type if the constructors were only used in pattern matches (i.e. in PatCon but never CoreCon)

[Neil Mitchell]

Wed Nov 28 17:02:30 PST 2007  Neil Mitchell
  * Fix Yhc.Core.Reachable. Could discard a useful data type if the constructors were only used in pattern matches (i.e. in PatCon but never CoreCon)

    M ./src/libraries/core/Yhc/Core/Reachable.hs -2 +3