Suppress unused-variables warning when OPEN_SYNC_FLAG isn't defined.
Per buildfarm.
Branch------master
Details-------http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=3ae28ce8c437811bba47c09d1212c2d3c41cb7ff
Modified Files--------------contrib/pg_test_fsync/pg_test_fsync.c | 9 ++++-----1 files changed, 4 insertions(+), 5 deletions(-)
