patch applied (ghc-6.8/ghc): MERGED: FIX #1715: egregious bug in ifaceDeclSubBndrs

[Ian Lynagh]

Thu Nov 22 04:35:51 PST 2007  Ian Lynagh <igloo at earth.li>
  * MERGED: FIX #1715: egregious bug in ifaceDeclSubBndrs
  simonpj at microsoft.com**20071120111723
   
   ifaceDeclSubBndrs didn't have an IfaceSyn case; but with type
   families an IfaceSyn can introduce subordinate binders.  Result:
   chaos.
   
   The fix is easy though.  Merge to 6.8 branch.

    M ./compiler/iface/IfaceSyn.lhs +5