cygpsid::get_id neglects to set the type to 0 (ACL_UNDEFINED_TAG in POSIX speak) if the SID can not be translated into a valid uid or gid. This in turn leads to incorrect handling of uid/gid -1 entries. Fix this by setting type to 0 if the id is unknown. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
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