Fix ref counting of retained messages.

src/database.c

@@ -626,10 +626,6 @@ int db__messages_easy_queue(struct mosquitto_db *db, struct mosquitto *context,
  }
  if(db__message_store(db, context, 0, topic_heap, qos, payloadlen, &payload_uhpa, retain, &stored, message_expiry_interval, local_properties, 0, origin)) return 1;
 
- if(retain){
- stored->ref_count++;
- }
-
  return sub__messages_queue(db, source_id, topic_heap, qos, retain, &stored);
 }
 
@@ -915,9 +911,6 @@ int db__message_release_incoming(struct mosquitto_db *db, struct mosquitto *cont
  * denied/dropped and is being processed so the client doesn't
  * keep resending it. That means we don't send it to other
  * clients. */
- if(retain){
- tail->store->ref_count++;
- }
  if(topic == NULL){
  db__message_remove(db, &context->msgs_in, tail);
  deleted = true;