Platform and compiler-specific checking for MSW and Mac now done

in wx/xxx/chkconf.h.
Removed some very obsolete settings, and MSW-specific settings
from Mac's setup0.h.
wxTimer now derives from wxEvtHandler.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/chkconf.h

@@ -11,6 +11,16 @@
 
 /* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
 
+/*
+   Compiler-specific checking.
+ */
+
+#if defined(__WXMSW__)
+#  include "wx/msw/chkconf.h"
+#elif defined(__WXMAC__)
+#  include "wx/mac/chkconf.h"
+#endif
+
 /*
    this global setting determines what should we do if the setting FOO
    requires BAR and BAR is not set: we can either silently define BAR