Fix bug with wd_init_interlock pointed out in [pgpool-general: 1956].
Fix bug with wd_init_interlock pointed out in [pgpool-general: 1956].

It writes too much than allocated memory.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres