pgsql: Fixed two more memory leaks in ecpglib.

Log Message:
-----------
Fixed two more memory leaks in ecpglib.
Synced parser.

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/ecpglib:
        data.c (r1.30 -> r1.31)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/data.c.diff?r1=1.30&r2=1.31)
    pgsql/src/interfaces/ecpg/pgtypeslib:
        interval.c (r1.31 -> r1.32)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/interval.c.diff?r1=1.31&r2=1.32)
    pgsql/src/interfaces/ecpg/preproc:
        preproc.y (r1.323 -> r1.324)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y.diff?r1=1.323&r2=1.324)