Fixed: GetFilesByAlbum should only return files for monitored releases

Since switching releases doesn't clear out trackfiles for unmonitored
releases, we need to ensure we only return files for monitored
releases otherwise we will return duplicates

src/NzbDrone.Core/MediaFiles/MediaFileRepository.cs

@@ -43,7 +43,9 @@ namespace NzbDrone.Core.MediaFiles
         public List<TrackFile> GetFilesByAlbum(int albumId)
         {
             return Query
-                .Where(f => f.AlbumId == albumId)
+                .Join<Track, AlbumRelease>(JoinType.Inner, t => t.AlbumRelease, (t, r) => t.AlbumReleaseId == r.Id)
+                .Where<AlbumRelease>(r => r.Monitored == true)
+                .AndWhere(f => f.AlbumId == albumId)
                 .ToList();
         }