[geeklog-hg] [Geeklog-Core/geeklog] 97cafe: Fixed E_NOTICE error

[Tom]

  Branch: refs/heads/master
  Home:   https://github.com/Geeklog-Core/geeklog
  Commit: 97cafe7c30c4565e5acc39390140bb1697f07373
      https://github.com/Geeklog-Core/geeklog/commit/97cafe7c30c4565e5acc39390140bb1697f07373
  Author: eSilverStrike <eSilverStrike at users.noreply.github.com>
  Date:   2022-01-12 (Wed, 12 Jan 2022)

  Changed paths:
    M system/classes/article.class.php

  Log Message:
  -----------
  Fixed E_NOTICE error