pgsql: pg_amcheck: Fix inconsistency in memory freeing

pg_amcheck: Fix inconsistency in memory freeing

The function in charge of freeing the memory from a result created by
PQescapeIdentifier() has to be PQfreemem(), to ensure that both
allocation and free come from libpq, but one spot in pg_amcheck was
missing that.

Oversight in b859d94c6389.

Author: Ranier Vilela <ranier.vf@gmail.com>
Reviewed-by: vignesh C <vignesh21@gmail.com>
Discussion: /messages/by-id/CAEudQArD_nKSnYCNUZiPPsJ2tNXgRmLbXGSOrH1vpOF_XtP0Vg@mail.gmail.com
Discussion: /messages/by-id/CAEudQArbTWVSbxq608GRmXJjnNSQ0B6R7CSffNnj2hPWMUsRNg@mail.gmail.com
Backpatch-through: 14

Branch
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REL_16_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/816149dc6bf9dfc1fa6bdb03ef52e1453fef736a

Modified Files
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src/bin/pg_amcheck/pg_amcheck.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)