Log Message:
-----------
Fix EncodeSpecialTimestamp to throw error on unrecognized input, rather than
returning a failure code that none of its callers bothered to check for.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
timestamp.c (r1.192 -> r1.193)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/timestamp.c?r1=1.192&r2=1.193)