check_ispconfig/check_ispconfig.php

@@ -77,11 +77,11 @@ if (empty($server_states)) {
 	$server_state = 'unknown';
 	$retval = 3;
 }
-elseif (is_array($server_states['critical']) && count($server_states['critical']) > 0 || is_array($server_states['error']) && count($server_states['error']) > 0) {
+elseif (isset($server_states['critical']) && count($server_states['critical']) > 0 || isset($server_states['error']) && count($server_states['error']) > 0) {
 	$server_state = 'critical';
 	$retval = 2;
 }
-elseif ($server_states['warning'] > 0) {
+elseif (isset($server_states['warning']) && $server_states['warning'] > 0) {
 	$server_state = 'warning';
 	$retval = 1;
 }