fix(xo-server/_handleBackupLog): bail instead of failing if Nagios plugin is not loaded

Introduced by ed34d9cbc

CHANGELOG.unreleased.md

@@ -27,4 +27,6 @@
 
 <!--packages-start-->
 
+- xo-server patch
+
 <!--packages-end-->

packages/xo-server/src/_handleBackupLog.mjs

@@ -5,6 +5,11 @@ import { createLogger } from '@xen-orchestra/log'
 const { warn } = createLogger('xo:server:handleBackupLog')
 
 async function sendToNagios(app, jobName, vmBackupInfo) {
+  if (app.sendPassiveCheck !== undefined) {
+    // Nagios plugin is not loaded
+    return
+  }
+
   try {
     const messageToNagios = {
       id: vmBackupInfo.id,