Version:           unspecified (using KDE 4.6.1) 
OS:                Linux

gluon_qtplayer git master 914e12220df0247246f4f154270e76bbca5efdf5
crashes if you run it with an not existing project

Reproducible: Always

Steps to Reproduce:
- run "gluon_qtplayer /does/not/exists"

Actual Results:  
- it crashes

Expected Results:  
- it should show me an error in the konsole or an error dialog that the target does not exists

(gdb) bt all
#0  GluonEngine::Scene::sceneContents (this=0x0)
    at /var/tmp/portage/media-libs/gluon-9999/work/gluon-9999/engine/scene.cpp:87
#1  0x00007ffff7bcef8b in GluonEngine::Game::setCurrentScene (this=0x6ca1c0, 
    newCurrentScene=0x0)
    at /var/tmp/portage/media-libs/gluon-9999/work/gluon-9999/engine/game.cpp:285
#2  0x0000000000404ff8 in GluonPlayer::MainWindow::startGame (this=0x7fffffffda70)
    at /var/tmp/portage/media-libs/gluon-9999/work/gluon-9999/player/qt/mainwindow.cpp:148
#3  0x000000000040529c in GluonPlayer::MainWindow::qt_metacall (this=0x7fffffffda70, 
    _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffffffd080)
    at /var/tmp/portage/media-libs/gluon-9999/work/gluon-9999_build/player/qt/mainwindow.moc:87
#4  0x00007ffff762605f in QMetaObject::activate (sender=0x9c0820, 
    m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0)
    at kernel/qobject.cpp:3278
#5  0x00007ffff762d35f in QSingleShotTimer::timerEvent (this=0x9c0820)
    at kernel/qtimer.cpp:308
#6  0x00007ffff7625829 in QObject::event (this=0x9c0820, e=<value optimized out>)
    at kernel/qobject.cpp:1181
#7  0x00007ffff69360a4 in QApplicationPrivate::notify_helper (this=0x60eb90, 
    receiver=0x9c0820, e=0x7fffffffd780) at kernel/qapplication.cpp:4462
#8  0x00007ffff693b3a1 in QApplication::notify (this=<value optimized out>, 
    receiver=0x9c0820, e=0x7fffffffd780) at kernel/qapplication.cpp:4341
#9  0x00007ffff760f72b in QCoreApplication::notifyInternal (this=0x7fffffffdaa0, 
    receiver=0x9c0820, event=0x7fffffffd780) at kernel/qcoreapplication.cpp:731
#10 0x00007ffff76407f6 in sendEvent (this=0x613920)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#11 QTimerInfoList::activateTimers (this=0x613920) at kernel/qeventdispatcher_unix.cpp:604
#12 0x00007ffff763d0b4 in timerSourceDispatch (source=<value optimized out>)
    at kernel/qeventdispatcher_glib.cpp:184
#13 0x00007ffff4cbc262 in g_main_dispatch (context=0x6125f0) at gmain.c:2149
#14 g_main_context_dispatch (context=0x6125f0) at gmain.c:2702
#15 0x00007ffff4cbca40 in g_main_context_iterate (context=0x6125f0, block=1, dispatch=1, 
    self=<value optimized out>) at gmain.c:2780
#16 0x00007ffff4cbccdd in g_main_context_iteration (context=0x6125f0, may_block=1)
    at gmain.c:2843
#17 0x00007ffff763d7cf in QEventDispatcherGlib::processEvents (this=0x60fd60, 
    flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#18 0x00007ffff69e79fe in QGuiEventDispatcherGlib::processEvents (
    this=<value optimized out>, flags=<value optimized out>)
    at kernel/qguieventdispatcher_glib.cpp:204
#19 0x00007ffff760e1f2 in QEventLoop::processEvents (this=<value optimized out>, 
    flags=...) at kernel/qeventloop.cpp:149
#20 0x00007ffff760e435 in QEventLoop::exec (this=0x7fffffffda10, flags=...)
    at kernel/qeventloop.cpp:201
#21 0x00007ffff7613939 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#22 0x00000000004045af in main (argc=2, argv=0x7fffffffdbd8)
    at /var/tmp/portage/media-libs/gluon-9999/work/gluon-9999/player/qt/main.cpp:34