libexec/check_snmp_disk_monitor.pl command line arguments 'warning' 'critical' ineffective

Commandlineargs fill up to $opt_crit and $opt_warn. Later using $opt_critical/$opt_warning

   'c:i' => \$opt_crit, 'critical:i' => \$opt_crit,
   'w:i' => \$opt_warn, 'warning:i' => \$opt_war,

change to:
   'c:i' => \$opt_critical, 'critical:i' => \$opt_critical,
   'w:i' => \$opt_warning, 'warning:i' => \$opt_warning,

regards
fueri