[wxMac] usage of MACOS_CLASSIC macro

[H]

Hi,

only in the xml-files the MACOS_CLASSIC macro is needed even if you 
would like to compile code for Mac OS X. I suggest to

replace MACOS_CLASSIC
by MACOS

or

by __WXMAC__

or anything else.

I know that the files are not part of the wxWidget library directly but 
the macro MACOS_CLASSIC is really misleading in this context.

Hartwig