This fixes an inclusion error caused by eb8a0914

 under WinRT x64 MSVC2013.

Change-Id: I3ebae0788264f4e3ccc0ae9f2bb4dbc4cceaa155
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Ulf Hermann <ulf.hermann@digia.com>