[xmonad] darcs patch: hide the implementation type in "EwmhDesktopsLayout"

[Joachim Breitner]

Hi,

this is what I hope a slight improvement over Malebria’s patch – thx by
the way.

Greetings,
Joachim

Tue Jun 10 21:29:18 CEST 2008  Joachim Breitner <mail at joachim-breitner.de>
  * hide the implementation type in "EwmhDesktopsLayout"
  Instead of exporting the EwmhDesktopsHook type, which is used internally,
  export a type alias for (HandleEvent EwmhDesktopsHook), so users don't have
  to update their xmonad.hs if the implementation changes.
  
  It could also be wrapped in a newtype, instead of a "type", but that would
  require manual instances of the various classes, as ghc can automatically
  derive the LayoutClass instance.

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