Log Message:
-----------
Properly adjust age() seconds to match the sign of the larger units.
Patch from Tom.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
timestamp.c (r1.179 -> r1.180)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/timestamp.c.diff?r1=1.179&r2=1.180)