[COMMITTERS] pgsql: Fix new warnings from GCC 7

Fix new warnings from GCC 7

This addresses the new warning types -Wformat-truncation
-Wformat-overflow that are part of -Wall, via -Wformat, in GCC 7.

Branch
------
REL9_5_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/14605156180a424ba519e7058e34af51d641bffd

Modified Files
--------------
contrib/pg_standby/pg_standby.c                 |  6 +++---
src/backend/access/heap/rewriteheap.c           |  4 ++--
src/backend/access/transam/xlog.c               |  6 +++---
src/backend/postmaster/pgstat.c                 |  4 ++--
src/backend/replication/basebackup.c            |  4 ++--
src/backend/replication/logical/reorderbuffer.c |  2 +-
src/backend/replication/logical/snapbuild.c     |  4 ++--
src/backend/replication/slot.c                  |  6 +++---
src/backend/storage/file/copydir.c              | 10 +++++-----
src/backend/storage/file/fd.c                   | 12 ++++++------
src/backend/storage/file/reinit.c               |  8 ++++----
src/backend/storage/ipc/dsm.c                   |  4 ++--
src/backend/utils/adt/dbsize.c                  | 14 +++++++-------
src/backend/utils/cache/relcache.c              |  4 ++--
src/backend/utils/error/elog.c                  |  2 +-
src/backend/utils/time/snapmgr.c                |  4 ++--
src/bin/initdb/initdb.c                         |  4 ++--
src/bin/pg_archivecleanup/pg_archivecleanup.c   |  4 ++--
src/bin/pg_basebackup/pg_receivexlog.c          |  2 +-
src/bin/pg_resetxlog/pg_resetxlog.c             | 12 ++++++------
src/bin/pg_rewind/copy_fetch.c                  | 10 +++++-----
src/timezone/pgtz.c                             |  4 ++--
22 files changed, 65 insertions(+), 65 deletions(-)