Clean up wxWindows class's function declaration.
Clean up wxWindows class's function declaration.

darcs-hash:20080425054152-c1071-b43e0657e34b71c9f6007ef5f0c2c3c6a638917b.gz

sherwoodwang/wxHaskell,sherwoodwang/wxHaskell,ekmett/wxHaskell,thielema/wxhaskell,ekmett/wxHaskell,sherwoodwang/wxHaskell,Proclivis/wxHaskell,thielema/wxhaskell,Proclivis/wxHaskell,thielema/wxhaskell,Proclivis/wxHaskell,sherwoodwang/wxHaskell,Proclivis/wxHaskell,thielema/wxhaskell,ekmett/wxHaskell