[Svn] [roundcube/roundcubemail] 50312a: Fix fatal error on asset_exists() use

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/roundcube/roundcubemail
  Commit: 50312af17e1322572fb490bd464036a703506e37
      https://github.com/roundcube/roundcubemail/commit/50312af17e1322572fb490bd464036a703506e37
  Author: Aleksander Machniak <machniak at kolabsys.com>
  Date:   2018-04-12 (Thu, 12 Apr 2018)

  Changed paths:
    M plugins/jqueryui/jqueryui.php

  Log Message:
  -----------
  Fix fatal error on asset_exists() use