[dovecot/core] 30c9ff: lib-storage: Clear list error before mailbox_list_...

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: 30c9ffa5fd5d7f6b7d7b8812714eea8c61651135
      https://github.com/dovecot/core/commit/30c9ffa5fd5d7f6b7d7b8812714eea8c61651135
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-04-30 (Sat, 30 Apr 2016)

  Changed paths:
    M src/lib-storage/mailbox-list.c

  Log Message:
  -----------
  lib-storage: Clear list error before mailbox_list_get_hierarchy_sep()

With ACL plugin enabled the call could have triggered dovecot-acl-list
rebuild, which in turn could have set list errors if it didn't have
permissions to all the mailboxes. This caused IMAP logins to fail.