pgsql: Display only 9 not 10 digits of precision for timestamp values

Log Message:
-----------
Display only 9 not 10 digits of precision for timestamp values when
using non-integer timestamps.  This prevents the display of rounding
errors for common values like days < 32.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        datetime.c (r1.145 -> r1.146)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c.diff?r1=1.145&r2=1.146)
    pgsql/src/interfaces/ecpg/pgtypeslib:
        interval.c (r1.16 -> r1.17)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/interval.c.diff?r1=1.16&r2=1.17)