Fix warning with MSVC 2013

warning C4100: 'name' : unreferenced formal parameter

This is despite the new Q_ASSERT "using" its expression even in release
mode.

Change-Id: Ieebfc4ab72a6493eaa68ffff13ead0574dd78627
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>

src/dbus/qdbusabstractinterface.cpp

@@ -216,6 +216,7 @@ void QDBusAbstractInterfacePrivate::_q_serviceOwnerChanged(const QString &name,
                                                            const QString &newOwner)
 {
     Q_UNUSED(oldOwner);
+    Q_UNUSED(name);
     //qDebug() << "QDBusAbstractInterfacePrivate serviceOwnerChanged" << name << oldOwner << newOwner;
     if (name == service) {
         currentOwner = newOwner;