pgsql: Back out part of patch that should be applied later.

Log Message:
-----------
Back out part of patch that should be applied later.

Modified Files:
--------------
pgsql/src/backend/utils/adt:
datetime.c (r1.148 -> r1.149)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c.diff?r1=1.148&r2=1.149)
pgsql/src/interfaces/ecpg/pgtypeslib:
interval.c (r1.20 -> r1.21)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/interval.c.diff?r1=1.20&r2=1.21)
pgsql/src/test/regress/expected:
horology.out (r1.54 -> r1.55)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/horology.out.diff?r1=1.54&r2=1.55)