patch applied (ghc): Fix zonking in mkExports

[Simon Peyton Jones]

Thu Sep  6 02:03:46 PDT 2007  simonpj at microsoft.com
  * Fix zonking in mkExports
  
  I'd missed zonk, so that an error message for missing type signature
  read (unhelpfully)
  
    main/GHC.hs:1070:0:
       Warning: Definition but no type signature for `upsweep''
                Inferred type: upsweep' :: forall t1. t
  
  The trouble was that 't' hadn't been zonked.
  
  Push to the stable branch
  

    M ./compiler/typecheck/TcBinds.lhs -5 +6