message: Fix bug of tells to unfound targets causing crash
  'doh :)
diff: @@ -1380,7 +1380,7 @@ void MapInstance::process_chat(Entity *sender, QString &msg_text)
  << "\n\t" << "target_name:" << target_name
  << "\n\t" << "msg_text:" << msg_text;
  - Entity *tgt;
  + Entity *tgt = nullptr;
  for(MapClientSession *cl : m_session_store)
  {
  if(cl->m_ent->name() == target_name)
  