patch applied (ghc-6.10/ghc): Fix Trac #2597 (second bug): complain about an empty DoE block

[Ian Lynagh]

Sat Sep 20 14:11:01 PDT 2008  simonpj at microsoft.com
  * Fix Trac #2597 (second bug): complain about an empty DoE block
  
  When converting an empty do-block from TH syntax to HsSyn,
  complain rather than crashing.
  

    M ./compiler/hsSyn/Convert.lhs -2 +4

View patch online:
http://darcs.haskell.org/ghc-6.10/ghc/_darcs/patches/20080920211101-1287e-e40ee9446fe329bc1094153c624a1677164bb34b.gz