Avoid possible crash on exit when the IP filter is enabled

src/qtlibtorrent/filterparserthread.h

@@ -407,6 +407,8 @@ protected:
         ruleCount = parseDATFilterFile(filePath);
       }
     }
+    if(abort)
+      return;
     try {
       s->set_ip_filter(filter);
       emit IPFilterParsed(ruleCount);

src/qtlibtorrent/qbtsession.cpp

@@ -161,9 +161,6 @@ QBtSession::~QBtSession() {
 #endif
   saveSessionState();
   saveFastResumeData();
-  qDebug("Deleting the session");
-  delete s;
-  qDebug("Session deleted");
   // Delete our objects
   if(m_tracker)
     delete m_tracker;
@@ -178,6 +175,8 @@ QBtSession::~QBtSession() {
   // HTTP Server
   if(httpServer)
     delete httpServer;
+  qDebug("Deleting the session");
+  delete s;
   qDebug("BTSession destructor OUT");
 }