Don't define COBJMACROS in objbase.h.
Update the Wine sources accordingly.

diff --git a/dlls/quartz/quartz_private.h b/dlls/quartz/quartz_private.h
index 52bc284..37443fd 100644
--- a/dlls/quartz/quartz_private.h
+++ b/dlls/quartz/quartz_private.h
@@ -25,6 +25,8 @@
 
 #include <stdarg.h>
 
+#define COBJMACROS
+
 #include "windef.h"
 #include "winbase.h"
 #include "wtypes.h"