[Pgpool-committers] pgpool - pgpool-II: Fix bind_rewrite_timestamp.

[User T-ishii]

Log Message:
-----------
Fix bind_rewrite_timestamp. It crashes if param length is -1, that
indicates NULL.

Modified Files:
--------------
    pgpool-II:
        pool_timestamp.c (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_timestamp.c?r1=1.6&r2=1.7)