Fix the config.tests for WMF backend.

Windows SDK v7.0 is required to compile the WMF backend,
so add additional check for MENonFatalError.

Change-Id: I3edb86b8132b8022b30c02ea6289f617aadfc683
Reviewed-by: Michael Goddard
(cherry picked from commit b738126352e5d914ea366b2725b72e2306b39ee2)
Reviewed-on: http://codereview.qt-project.org/5493


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>