[dovecot/core] 7a7340: lib-index: Compiler warning fix

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 7a73401fd07770bba714eefa71ba56f396ea4e6b
      https://github.com/dovecot/core/commit/7a73401fd07770bba714eefa71ba56f396ea4e6b
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-11-25 (Fri, 25 Nov 2016)

  Changed paths:
    M src/lib-index/mail-transaction-log.c

  Log Message:
  -----------
  lib-index: Compiler warning fix