resource-agents/heartbeat/nginx spewing harmless errors

corosync log is getting flooded with:

> Oct 07 17:22:32 [12364] xx lrmd: notice: operation_finished: Website_monitor_10000:22076:stderr [ ls: cannot access /etc/nginx/conf.d/_.conf: No such file or directory ]
> Oct 07 17:22:32 [12364] xx lrmd: notice: operation_finished: Website_monitor_10000:22076:stderr [ ls: cannot access /etc/nginx/default.d/_.conf: No such file or directory ]

Those don't exist and why should they? nginx -t passes just fine without them. I tried to lookup the logic that's generating them but failed -- the plugin is a mess.