Fix small memory leaks in GUC checks
Follow-up commit to
a9d58bfe8a3a. Backpatch down to v16 where
this was added in order to keep the code consistent for future
backpatches.
Author: Tofig Aliev <t.aliev@postgrespro.ru>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/
bba4313fdde9db46db279f96f3b748b1@postgrespro.ru
Backpatch-through: 16