message: Fixed a crash in "addNpc" slash command when executing it without any parameters.
diff: @@ -732,6 +732,7 @@ void addNpc(const QString &cmd, MapClientSession &sess)
  {
  qCDebug(logSlashCommand) << "Bad invocation:"<<cmd;
  sendInfoMessage(MessageChannel::USER_ERROR, "Bad invocation:"+cmd, &sess);
  + return;
  }
  glm::vec3 gm_loc = sess.m_ent->m_entity_data.m_pos;
  const NPCStorage & npc_store(sess.m_current_map->serverData().getNPCDefinitions());
  