Delete CoreAV's timer from the CoreAV thread

src/core/coreav.cpp

@@ -62,7 +62,7 @@ CoreAV::~CoreAV()
 {
     for (const ToxFriendCall& call : calls)
         cancelCall(call.callId);
-    stop();
+    killTimerFromThread();
     toxav_kill(toxav);
 }
 
@@ -87,6 +87,14 @@ void CoreAV::stop()
     iterateTimer->stop();
 }
 
+void CoreAV::killTimerFromThread()
+{
+    // Timers can only be touched from their own thread
+    if (QThread::currentThread() != coreavThread.get())
+        return (void)QMetaObject::invokeMethod(this, "killTimerFromThread", Qt::BlockingQueuedConnection);
+    iterateTimer.release();
+}
+
 void CoreAV::process()
 {
     toxav_iterate(toxav);

src/core/coreav.h

@@ -98,6 +98,7 @@ private slots:
     static void callCallback(ToxAV *toxAV, uint32_t friendNum, bool audio, bool video, void* self);
     static void stateCallback(ToxAV *, uint32_t friendNum, uint32_t state, void* self);
     static void bitrateCallback(ToxAV *toxAV, uint32_t friendNum, uint32_t arate, uint32_t vrate, void* self);
+    void killTimerFromThread(); ///< Calls itself blocking queued on the coreav thread
 
 private:
     void process();