pgsql: Use "foo(void)" for definitions of functions with no parameters.

Use "foo(void)" for definitions of functions with no parameters.

Standard practice in PostgreSQL is to use "foo(void)" instead of
"foo()", as the latter looks like an "old-style" function
declaration.  Similar changes were made in commits cdf4b9aff2,
0e72b9d440, 7069dbcc31, f1283ed6cc, 7b66e2c086, e95126cf04, and
9f7c527af3.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/aTBObQPg%2Bps5I7vl%40ip-10-97-1-34.eu-west-3.compute.internal

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/9b05e2ec08a3d174accb2a9e1c59e52e94799acc

Modified Files
--------------
src/backend/access/common/heaptuple.c                 | 2 +-
src/backend/access/index/genam.c                      | 2 +-
src/backend/replication/logical/applyparallelworker.c | 2 +-
src/backend/replication/logical/sequencesync.c        | 2 +-
src/backend/replication/logical/slotsync.c            | 2 +-
src/backend/replication/logical/tablesync.c           | 2 +-
src/backend/replication/logical/worker.c              | 4 ++--
src/backend/utils/adt/uuid.c                          | 4 ++--
src/bin/pg_basebackup/pg_createsubscriber.c           | 2 +-
9 files changed, 11 insertions(+), 11 deletions(-)