Fix error message /edit/firewall and /add/firewall

web/add/firewall/index.php

@@ -17,6 +17,7 @@ if ($_SESSION['userContext'] != 'admin') {
 exec(HESTIA_CMD."v-list-firewall-ipset 'json'", $output, $return_var);
 check_return_code($return_var, $output);
 $data = json_decode(implode('', $output), true);
+unset($output);
 
 $ipset_lists=[];
 foreach ($data as $key => $value) {

web/edit/firewall/index.php

@@ -46,6 +46,7 @@ if ($v_suspended == 'yes') {
 exec(HESTIA_CMD."v-list-firewall-ipset 'json'", $output, $return_var);
 check_return_code($return_var, $output);
 $data = json_decode(implode('', $output), true);
+unset($output);
 
 $ipset_lists=[];
 foreach ($data as $key => $value) {