Do not use a Bloom filter if any outer loop lacks STAT1 data, since without

Do not use a Bloom filter if any outer loop lacks STAT1 data, since without
STAT1 data, the query planner cannot make an accurate determination of
whether or not a Bloom filter will be useful.  This fixes the problem
reported by [forum:/forumpost/56de336385|forum post 56de336385].

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