pgsql: dbase_redo: Fix Valgrind-reported memory leak

dbase_redo: Fix Valgrind-reported memory leak

Introduced by my (Álvaro's) commit 9e4f914b5eba, which was itself
backpatched to pg10, though only pg15 and up contain the problem
because of commit 9c08aea6a309.

This isn't a particularly significant leak, but given the fix is
trivial, we might as well backpatch to all branches where it applies, so
do that.

Author: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Reported-by: Andres Freund <andres(at)anarazel(dot)de>
Discussion: https://postgr.es/m/x4odfdlrwvsjawscnqsqjpofvauxslw7b4oyvxgt5owoyf4ysn@heafjusodrz7

Branch
------
REL_16_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/c72b5c536032d636cf35d964c216c3e44e2b1efe

Modified Files
--------------
src/backend/commands/dbcommands.c | 1 +
1 file changed, 1 insertion(+)