Issue #3420340: Check if entity isNew() instead of the existence of the id()...

Issue #3420340: Check if entity isNew() instead of the existence of the id() in _revision_log_default_get_original()

Closes #3420340

revision_log_default.module

@@ -137,7 +137,7 @@ function _revision_log_default_get_original(ContentEntityInterface $entity) {
     $information = \Drupal::service('workbench_moderation.moderation_information');
     $is_moderated = $information->isModeratableEntity($entity);
   }
-  if ($is_moderated && $entity->id()) {
+  if ($is_moderated && !$entity->isNew()) {
     $node_storage = \Drupal::entityTypeManager()->getStorage('node');
     $latest_revision_id = $node_storage->getLatestRevisionId($entity->id());
     $latest = $node_storage->loadRevision($latest_revision_id);