[dovecot/core] 4ff4bd: acl: Fix return value of acl_attribute_get_acl

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 4ff4bd024a9b6e7973b76b186ce085c2ca669d3e
      https://github.com/dovecot/core/commit/4ff4bd024a9b6e7973b76b186ce085c2ca669d3e
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2018-06-29 (Fri, 29 Jun 2018)

  Changed paths:
    M src/plugins/acl/acl-attributes.c

  Log Message:
  -----------
  acl: Fix return value of acl_attribute_get_acl

If matching acl entry is not found, it must return 0
and not 1 because it did not find anything.

Fixes dsync: Panic: file mailbox-attribute.c: line 362 (mailbox_attribute_get_stream): assertion failed: (value_r->value != NULL || value_r->value_stream != NULL)

Broken in 37c72fa0cd3f1d74d79b64afb3fb6da5ffd4fe3a

Found by @dl8bh



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