pgpool - pgpool: Fix show pool_status command bug.

Log Message:
-----------
Fix show pool_status command bug. Sometimes secondary host is showed
"unused" even it is actually used.

Modified Files:
--------------
pgpool:
pool_config.l (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool/pool_config.l.diff?r1=1.3&r2=1.4)