[dovecot/core] 2229fd: auth: Fix %{ldap_dn} not to leak memory

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: 2229fd7b273a1290c7b21062c153546ea3edb940
      https://github.com/dovecot/core/commit/2229fd7b273a1290c7b21062c153546ea3edb940
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2017-10-20 (Fri, 20 Oct 2017)

  Changed paths:
    M src/auth/db-ldap.c

  Log Message:
  -----------
  auth: Fix %{ldap_dn} not to leak memory