[xmonad] Illegal Signature in SubLayouts module with ghc 6.8

rupa rupa at lrrr.us
Tue Apr 28 14:36:06 EDT 2009

When trying to compile xmonad latest darcs under ghc 6.8.2dfsg1-1ubuntu1
(jaunty default) I got the following error:

 Illegal signature in pattern: LayoutMessages
 Use -XPatternSignatures to permit it

Apparently people using 6.10 do not get this error, which went away when I
added PatternSignatures to the LANGUAGE pragmas of the modules as suggested
in IRC.

Just a heads up, I'm not sure what, if anything, should be done here ...
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