Comment 1 for bug 1472325

Stacktrace says qtmir

#0 qtmir::MirSurfaceItem::updateMirSurfaceFocus (this=0x245b838, focused=<optimized out>) at /build/buildd/qtmir-0.4.5+15.10.20150617/src/modules/Unity/Application/mirsurfaceitem.cpp:735
#1 0xb647ac7a in call (a=0xbeedf40c, r=<optimized out>, this=0x24db070) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
No locals.
#2 QMetaObject::activate (sender=0x245b838, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0xbeedf40c) at kernel/qobject.cpp:3702
        obj = {d = 0x24db070}
        receiverInSameThread = <optimized out>
        sw = {receiver = 0x245b838, previousSender = 0x0, currentSender = {sender = 0x245b838, signal = 7, ref = 1}, switched = true}
        callFunction = <optimized out>
        receiver = <optimized out>
        method_relative = 0
        c = 0x24db088
        last = 0x24db088
        locker = {val = 3059759924}
        connectionLists = {connectionLists = 0x25fefb8}
        list = 0x2610e98
        signal_index = 7
        empty_argv = {0x0}
        currentThreadId = 0xb6efb000
#3 0xb647b2ee in QMetaObject::activate (sender=<optimized out>, m=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0xbeedf40c) at kernel/qobject.cpp:3582
No locals.
#4 0xb6d4ce78 in QQuickItem::activeFocusChanged (this=<optimized out>, _t1=false) at .moc/moc_qquickitem.cpp:987
        _a = {0x0, 0xbeedf407}