Turns out with Win9x, we could occasionally return from unix_convert() given

Turns out with Win9x, we could occasionally return from unix_convert() given
a mangled name without a valid stat struct if the file existed. This would
then cause open_file_shared1() to erroneously think the file open was new,
thus not check for oplock break, thus causing a spurious EAGAIN reply to
the open on a file we already had kernel oplocked.... (phew - that was fun
to track down :-).
Jeremy.