Compile

Change-Id: I27c2fabf1f4b0fdb9a1c3fd238b92f46a339a721
Reviewed-on: http://codereview.qt-project.org/5209
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

src/widgets/kernel/qplatformmenu_qpa.h

@@ -71,7 +71,8 @@ public:
     virtual void syncSeparatorsCollapsible(bool enable);
 };
 
-struct Q_WIDGETS_EXPORT QPlatformMenuBar {
+class Q_WIDGETS_EXPORT QPlatformMenuBar {
+public:
     QPlatformMenuBar();
     virtual ~QPlatformMenuBar();