[check_fortigate.pl] sdwan-hc first failed health check not detected

[dbecker1234]

Hi,

line 1175

      if ($#sdwan_hc_failed > 0) {
         $return_string = 'SDWAN HC Failed: '.join(';', @sdwan_hc_failed);
         $return_state = 'CRITICAL';
      }

$#sdwan_hc_failed returns -1 on empty array and 0 with one element. So to detect the first outage correctly, the if statement should be:

if ($#sdwan_hc_failed >= 0) {