[geeklog-hg] [Geeklog-Core/geeklog] 7b12d5: Fixed non-existent index notice

[Kenji ITO]

  Branch: refs/heads/master
  Home:   https://github.com/Geeklog-Core/geeklog
  Commit: 7b12d5ac5fb8953d31820acf9d7909e1f3bc1c58
      https://github.com/Geeklog-Core/geeklog/commit/7b12d5ac5fb8953d31820acf9d7909e1f3bc1c58
  Author: mystralkk <mystralkk at gmail.com>
  Date:   2019-10-01 (Tue, 01 Oct 2019)

  Changed paths:
    M system/lib-topic.php

  Log Message:
  -----------
  Fixed non-existent index notice