post_status_service.rb: save the status after setting local_only

app/services/post_status_service.rb

@@ -41,6 +41,7 @@ class PostStatusService < BaseService
     DistributionWorker.perform_async(status.id)
 
     status.local_only = status.marked_local_only?
+    status.save!
 
     unless status.local_only
       Pubsubhubbub::DistributionWorker.perform_async(status.stream_entry.id)