Thread: pgsql: Fix a couple of memory leaks in src/bin/pg_basebackup/

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

Branch
------
REL_10_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/4372f0685de164e769e895dbada18cad792192b2

Modified Files
--------------
src/bin/pg_basebackup/receivelog.c | 7 +++++++
src/bin/pg_basebackup/walmethods.c | 7 +++++++
src/bin/pg_basebackup/walmethods.h | 4 ++--
3 files changed, 16 insertions(+), 2 deletions(-)