Fix crash on unloading Qt4 projects

Change-Id: I6e05026e87ba1cf8a8e9d40fac7dd33c82f5a3ff
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/qt4projectmanager/qt4nodes.cpp

@@ -1478,7 +1478,7 @@ Qt4ProFileNode::~Qt4ProFileNode()
     m_parseFutureWatcher.waitForFinished();
     if (m_readerExact) {
         // Oh we need to clean up
-        applyEvaluate(EvalFail, true);
+        applyEvaluate(EvalAbort, true);
         m_project->decrementPendingEvaluateFutures();
     }
 }