patch applied (ghc): :print command - Do not compute all the custom printers, only the first one matching

[Pepe Iborra]

Sat Apr 14 10:30:46 PDT 2007  Pepe Iborra <mnislaih at gmail.com>
  * :print command - Do not compute all the custom printers, only the first one matching

    M ./compiler/ghci/Debugger.hs -1 +1
    M ./compiler/ghci/RtClosureInspect.hs -6 +7