wxVariant is in wxBase so should be forward declared using WXDLLIMPEXP_BASE and not WXDLLEXPORT

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34796 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/ole/oleutils.h

@@ -230,7 +230,7 @@ private:
 };
 
 // Convert variants
-class WXDLLEXPORT wxVariant;
+class WXDLLIMPEXP_BASE wxVariant;
 
 bool wxConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant) ;
 bool wxConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant) ;