[dovecot/core] 9b5576: lib: Fix -Wstrict-bool compiler warnings.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 9b5576a265cbadb1f0b3c3d5e40e928e1fed1ec9
      https://github.com/dovecot/core/commit/9b5576a265cbadb1f0b3c3d5e40e928e1fed1ec9
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2017-01-31 (Tue, 31 Jan 2017)

  Changed paths:
    M src/lib/test-path-util.c

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