Thread: pgsql: Added PGTYPEStimestamp_add_interval written by Dave Cramer.

Log Message:
-----------
Added PGTYPEStimestamp_add_interval written by Dave Cramer.
Fixed parsing of defines to make sure they used more than once.

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/pgtypeslib:
        dt.h (r1.20 -> r1.21)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/dt.h.diff?r1=1.20&r2=1.21)
        dt_common.c (r1.19 -> r1.20)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/dt_common.c.diff?r1=1.19&r2=1.20)
        timestamp.c (r1.22 -> r1.23)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/timestamp.c.diff?r1=1.22&r2=1.23)
    pgsql/src/interfaces/ecpg/preproc:
        pgc.l (r1.132 -> r1.133)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/pgc.l.diff?r1=1.132&r2=1.133)