Avoid warnings from MSVC 2008

Change-Id: Id8f75c19c8a6609e74900a71013c2fbbdbb3669a
Reviewed-on: http://codereview.qt.nokia.com/3677


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Shane Bradley <shane.bradley@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>