fix(backups/formatVmBackup): handle snapshotless backups (#7342)

Introduced by b48d955c44

@xen-orchestra/backups/formatVmBackups.mjs

@@ -6,7 +6,8 @@ function formatVmBackup(backup) {
 
   let differencingVhds
   let dynamicVhds
-  const withMemory = vmSnapshot.suspend_VDI !== 'OpaqueRef:NULL'
+  // some backups don't use snapshots, therefore cannot be with memory
+  const withMemory = vmSnapshot !== undefined && vmSnapshot.suspend_VDI !== 'OpaqueRef:NULL'
   // isVhdDifferencing is either undefined or an object
   if (isVhdDifferencing !== undefined) {
     differencingVhds = Object.values(isVhdDifferencing).filter(t => t).length

CHANGELOG.unreleased.md

@@ -32,6 +32,7 @@
 
 <!--packages-start-->
 
+- @xen-orchestra/backups patch
 - xo-web minor
 
 <!--packages-end-->