#20150: Fixing possible NullReferenceExceptions after resuming a paused workflow.

Work Item: 20150

src/Orchard.Web/Modules/Orchard.Workflows/Services/WorkflowManager.cs

@@ -209,6 +209,7 @@ namespace Orchard.Workflows.Services {
                 foreach (var blocking in blockedOn) {
                     workflow.AwaitingActivities.Add(new AwaitingActivityRecord {
                         ActivityRecord = blocking,
+                        WorkflowRecord = workflow
                     });
                 }
             }