[dovecot/core] fece64: lib-fs: Fixes to stats count tracking

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: fece64e92adf33622ff6238f4050100f305fc007
      https://github.com/dovecot/core/commit/fece64e92adf33622ff6238f4050100f305fc007
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-05-05 (Thu, 05 May 2016)

  Changed paths:
    M src/lib-fs/fs-api.c

  Log Message:
  -----------
  lib-fs: Fixes to stats count tracking

fs_exists(), fs_copy(), fs_rename() and fs_delete() could have increased the
count multiple times on async operations.