Second attempt at fixing saving settings on shutdown.

src/headlessloader.h

@@ -41,6 +41,7 @@ class HeadlessLoader: public QObject {
 
 public:
   HeadlessLoader(const QStringList &torrentCmdLine) {
+    connect(static_cast<SessionApplication*>(qApp), SIGNAL(aboutToQuit()), this, SLOT(deleteBTSession()), Qt::DirectConnection);
     Preferences pref;
     // Enable Web UI
     pref.setWebUiEnabled(true);
@@ -61,11 +62,11 @@ public:
     }
   }
 
-  ~HeadlessLoader() {
+public slots:
+  void deleteBTSession() {
     QBtSession::drop();
   }
 
-public slots:
   // Call this function to exit qBittorrent headless loader
   // and return to prompt (object will be deleted by main)
   void exit() {