QmlDesinger.NodeInstances: Fix bounding rectangle calculation

Change-Id: Ia0633416e50da68377a781050e301e5721540d6b
Reviewed-on: http://codereview.qt.nokia.com/3971Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/sgitemnodeinstance.cpp

@@ -276,7 +276,7 @@ QRectF SGItemNodeInstance::boundingRectWithStepChilds(QSGItem *parentItem) const
     QRectF boundingRect = parentItem->boundingRect();
 
     foreach (QSGItem *childItem, parentItem->childItems()) {
-        if (nodeInstanceServer()->hasInstanceForObject(childItem)) {
+        if (!nodeInstanceServer()->hasInstanceForObject(childItem)) {
             QRectF transformedRect = childItem->mapRectToItem(parentItem, boundingRectWithStepChilds(childItem));
             if (isRectangleSane(transformedRect))
                 boundingRect = boundingRect.united(transformedRect);