Fixed: Adding albums with unknown items in queue

src/NzbDrone.Core/Download/Aggregation/RemoteAlbumAggregationService.cs

@@ -25,6 +25,11 @@ namespace NzbDrone.Core.Download.Aggregation
 
         public RemoteAlbum Augment(RemoteAlbum remoteAlbum)
         {
+            if (remoteAlbum == null)
+            {
+                return null;
+            }
+
             foreach (var augmenter in _augmenters)
             {
                 try

src/NzbDrone.Core/Music/Handlers/ArtistScannedHandler.cs

@@ -47,7 +47,7 @@ namespace NzbDrone.Core.Music
 
             _eventAggregator.PublishEvent(new ArtistAddCompletedEvent(artist));
 
-            if (artist.AddOptions.SearchForMissingAlbums)
+            if (addOptions.SearchForMissingAlbums)
             {
                 _commandQueueManager.Push(new MissingAlbumSearchCommand(artist.Id));
             }