Only declare wxSetClipboardData() in wxMSW when it's defined

This is only the case when full OLE support is disabled.

See https://github.com/wxWidgets/wxWidgets/pull/491

include/wx/msw/clipbrd.h

@@ -24,9 +24,11 @@ WXDLLIMPEXP_CORE bool wxCloseClipboard();
 
 // get/set data
 WXDLLIMPEXP_CORE bool wxEmptyClipboard();
+#if !wxUSE_OLE
 WXDLLIMPEXP_CORE bool wxSetClipboardData(wxDataFormat dataFormat,
                                     const void *data,
                                     int width = 0, int height = 0);
+#endif // !wxUSE_OLE
 
 // clipboard formats
 WXDLLIMPEXP_CORE bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat);