Restore explicit _WIN32_WINVER in the ODK example

Change-Id: I01855c37955dcae13dbb3c6f028d4030dc48945a
Reviewed-on: https://gerrit.libreoffice.org/61657Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Jenkins

odk/examples/OLE/activex/StdAfx2.h

@@ -41,6 +41,9 @@
 #define INCLUDED_EXAMPLES_ACTIVEX_STDAFX2_H
 
 #define STRICT
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0502
+#endif
 #define _ATL_APARTMENT_THREADED
 #define _ATL_STATIC_REGISTRY