Fix the config.tests for WMF backend.
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 <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Michael Goddard <3ec82c9d770214b86c58e0ffe200ac64c3ff8da3@nokia.com>

sergiusens/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,webOS-ports/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,sergiusens/qtmultimedia,mer-qt/qtmultimedia,sergiusens/qtmultimedia,mer-qt/qtmultimedia,mer-qt/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,mer-qt/qtmultimedia