move deletion to deleteMarkedListeners

Author: thomasjball

source/drivers/MessageBus.cpp

@@ -263,7 +263,11 @@ int MessageBus::deleteMarkedListeners()
             Listener *t = l;
             l = l->next;
 
-            delete t;
+            // If notification of deletion has been requested, invoke the listener deletion callback.
+            if (listener_deletion_callback)
+                listener_deletion_callback(t);
+            
+                delete t;
             removed++;
 
             continue;
@@ -520,10 +524,6 @@ int MessageBus::remove(Listener *listener)
             {
                 if ((listener->id == DEVICE_ID_ANY || listener->id == l->id) && (listener->value == DEVICE_EVT_ANY || listener->value == l->value))
                 {
-                    // If notification of deletion has been requested, invoke the listener deletion callback.
-                    if (listener_deletion_callback)
-                        listener_deletion_callback(l);
-
                     // Found a match. mark this to be removed from the list.
                     l->flags |= MESSAGE_BUS_LISTENER_DELETING;
                     removed++;