Fixed: Rare case of null quality causing issues with manual import.

Fixes #2227

src/NzbDrone.Core/MediaFiles/EpisodeImport/ImportApprovedMovie.cs

@@ -49,13 +49,16 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport
         {
             _logger.Debug("Decisions: {0}", decisions.Count);
 
+            //I added a null op for the rare case that the quality is null. TODO: find out why that would even happen in the first place.
             var qualifiedImports = decisions.Where(c => c.Approved)
                .GroupBy(c => c.LocalMovie.Movie.Id, (i, s) => s
-                   .OrderByDescending(c => c.LocalMovie.Quality, new QualityModelComparer(s.First().LocalMovie.Movie.Profile))
+                   .OrderByDescending(c => c.LocalMovie.Quality ?? new QualityModel{Quality = Quality.Unknown}, new QualityModelComparer(s.First().LocalMovie.Movie.Profile))
                    .ThenByDescending(c => c.LocalMovie.Size))
                .SelectMany(c => c)
                .ToList();
 
+
+
             var importResults = new List<ImportResult>();
 
             foreach (var importDecision in qualifiedImports.OrderBy(e => e.LocalMovie.Size)