QmlDesigner.NodeInstances: Fix crash for dot properties

Change-Id: I5fcecd6fb1e50220053b2769e549f62203f33a06
Reviewed-on: http://codereview.qt.nokia.com/4075
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

share/qtcreator/qml/qmlpuppet/instances/objectnodeinstance.cpp

@@ -573,7 +573,7 @@ QVariant ObjectNodeInstance::property(const QString &name) const
 
     QDeclarativeProperty property(object(), name, context());
     if (property.property().isEnumType()) {
-        QVariant value = object()->property(name.toLatin1());
+        QVariant value = property.read();
         return property.property().enumerator().valueToKey(value.toInt());
     }