pgsql-server: Suppress compile warnings on machines where the

Log Message:
-----------
Suppress compile warnings on machines where the INT64CONST() decoration
is actually needed.  Backport of Oliver Elphick's recent patch.

Tags:
----
REL7_4_STABLE

Modified Files:
--------------
    pgsql-server/src/backend/utils/adt:
        date.c (r1.93 -> r1.93.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/date.c.diff?r1=1.93&r2=1.93.2.1)
        datetime.c (r1.118.2.2 -> r1.118.2.3)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/datetime.c.diff?r1=1.118.2.2&r2=1.118.2.3)
    pgsql-server/src/interfaces/ecpg/pgtypeslib:
        dt_common.c (r1.12 -> r1.12.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/pgtypeslib/dt_common.c.diff?r1=1.12&r2=1.12.2.1)