[dovecot/core] 34742a: Fix -Wstrict-bool compiler warnings.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 34742a4b92c16c300e3d75731685b678712340b2
      https://github.com/dovecot/core/commit/34742a4b92c16c300e3d75731685b678712340b2
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-11-15 (Tue, 15 Nov 2016)

  Changed paths:
    M src/lib-index/mail-index-sync-update.c
    M src/lib/sha3.c

  Log Message:
  -----------
  Fix -Wstrict-bool compiler warnings.