[dovecot/core] 75a7ba: dict: Set default transaction commit callback

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 75a7ba70c7b377eff0f7124b8943cf2976ac2533
      https://github.com/dovecot/core/commit/75a7ba70c7b377eff0f7124b8943cf2976ac2533
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2016-05-13 (Fri, 13 May 2016)

  Changed paths:
    M src/lib-dict/dict.c

  Log Message:
  -----------
  dict: Set default transaction commit callback

Removes need for NULL check on drivers