{auto} improve the tagger destructor to also unset the onAck() and onNack() callbacks

src/tagger.cpp

@@ -45,6 +45,15 @@ Tagger::~Tagger()
 {
     // restore the error-callback
     _implementation->onError(nullptr);
+    
+    // also unset the callbacks for onAck and onNack
+    auto *deferred = _implementation->confirm();
+    
+    // unlikely case that the onAck and onNack are not set
+    if (deferred == nullptr) return;
+    
+    // unset the callbacks
+    deferred->onAck(nullptr).onNack(nullptr);
 }
 
 /**