[dovecot/core] da8e73: director: Don't access freed memory during deinit

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: da8e733d72bf4a65ed7e1109cbb848c03f001c12
      https://github.com/dovecot/core/commit/da8e733d72bf4a65ed7e1109cbb848c03f001c12
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-11-11 (Fri, 11 Nov 2016)

  Changed paths:
    M src/director/mail-host.c

  Log Message:
  -----------
  director: Don't access freed memory during deinit