Fix a couple of memory leaks in src/bin/pg_basebackup/

Michael Paquier <michael@paquier.xyz>

Commit: c4ef3b81b85434b3d2eac8d0cca3a0078898266a
Author: Michael Paquier <michael@paquier.xyz>
Date: 2021-07-26T02:14:14Z
Releases: 12.8
Fix a couple of memory leaks in src/bin/pg_basebackup/

These have been introduced by 7fbe0c8, and could happen for
pg_basebackup and pg_receivewal.

Per report from Coverity for the ones in walmethods.c, I have spotted
the ones in receivelog.c after more review.

Backpatch-through: 10

Files