Log Message:
-----------
In the integer-datetimes case, date2timestamp and date2timestamptz need
to check for overflow because the legal range of type date is actually
wider than timestamp's. Problem found by Neil Conway.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
date.c (r1.135 -> r1.136)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/date.c?r1=1.135&r2=1.136)