pgsql: Fix incorrect close() call in dsm_impl_mmap().

Fix incorrect close() call in dsm_impl_mmap().

One improbable error-exit path in this function used close() where
it should have used CloseTransientFile().  This is unlikely to be
hit in the field, and I think the consequences wouldn't be awful
(just an elog(LOG) bleat later).  But a bug is a bug, so back-patch
to 9.4 where this code came in.

Pan Bian

Discussion: https://postgr.es/m/152056616579.4966.583293218357089052@wrigleys.postgresql.org

Branch
------
REL9_6_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/494f3cb5bbdae3d75b0100559a8a05020e8338ff

Modified Files
--------------
src/backend/storage/ipc/dsm_impl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)