check_cdot_metrocluster_state: "use of uninitialized value [...]"

[tectumopticum]

If you run the plugin against a system which is not a metrocluster you'll get this output:

Use of uninitialized value $local_mode in concatenation (.) or string at /usr/lib/nagios/plugins/contrib/check_cdot_metrocluster_state.pl line 78.
Use of uninitialized value $local_check in concatenation (.) or string at /usr/lib/nagios/plugins/contrib/check_cdot_metrocluster_state.pl line 78.
Use of uninitialized value $remote_config in concatenation (.) or string at /usr/lib/nagios/plugins/contrib/check_cdot_metrocluster_state.pl line 78.
Use of uninitialized value $remote_mode in concatenation (.) or string at /usr/lib/nagios/plugins/contrib/check_cdot_metrocluster_state.pl line 78.
Use of uninitialized value $remote_check in concatenation (.) or string at /usr/lib/nagios/plugins/contrib/check_cdot_metrocluster_state.pl line 78.
CRITICAL: Local-Config: not_configured, Local-Mode: , Local-Periodic-Check: , Remote-Config: , Remote-Mode: , Remote-Periodic-Check:

Of course, you wouldn't normally do that ;)
But the other metrocluster-plugins (e.g. check_cdot_metrocluster_check.pl) do a better error-handling in this case.