pgsql: Fix incorrect logic in plan dependency recording

Fix incorrect logic in plan dependency recording

Both 50e17ad28 and 29f45e299 mistakenly tried to record a plan dependency
on a function but mistakenly inverted the OidIsValid test. This meant
that we'd record a dependency only when the function's Oid was
InvalidOid. Clearly this was meant to *not* record the dependency in
that case.

50e17ad28 made this mistake first, then in v15 29f45e299 copied the same
mistake.

Reported-by: Tom Lane
Backpatch-through: 14, where 50e17ad28 first made this mistake
Discussion: https://postgr.es/m/2277537.1694301772@sss.pgh.pa.us

Branch
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REL_16_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/1a6900e58ae2c61b84b516901985e405b9d457b7

Modified Files
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src/backend/optimizer/plan/setrefs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)