compat: Ensure newer Windows version defines exist.
compat: Ensure newer Windows version defines exist.

Some of the WinSDK headers (e.g, dcomp.h) rely on them being defined,
but not all MinGW versions out there have them.

schulmar/apitrace,trtt/apitrace,apitrace/apitrace,trtt/apitrace,schulmar/apitrace,schulmar/apitrace,apitrace/apitrace,apitrace/apitrace,trtt/apitrace,trtt/apitrace,schulmar/apitrace,apitrace/apitrace,schulmar/apitrace,trtt/apitrace