patch applied (ghc): GHCi debugger: new flag -fbreak-on-error

[Pepe Iborra]

Tue Sep 11 03:14:43 PDT 2007  Pepe Iborra <mnislaih at gmail.com>
  * GHCi debugger: new flag -fbreak-on-error
      
      This flag works like -fbreak-on-exception, but only stops
      on uncaught exceptions.

    M ./compiler/main/DynFlags.hs +2
    M ./compiler/main/InteractiveEval.hs -8 +20