Added lost+found to SpecialFolders list

src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs

@@ -63,6 +63,7 @@ public void should_be_able_to_remove_root_dir()
             Mocker.GetMock<IBasicRepository<RootFolder>>().Verify(c => c.Delete(1), Times.Once());
         }
 
+        [Test]
         public void None_existing_folder_returns_empty_list()
         {
             WithNoneExistingFolder();

src/NzbDrone.Core/RootFolders/RootFolderService.cs

@@ -30,7 +30,7 @@ public class RootFolderService : IRootFolderService
         private readonly ISeriesRepository _seriesRepository;
         private readonly IConfigService _configService;
 
-        private static readonly HashSet<string> SpecialFolders = new HashSet<string> { "$recycle.bin", "system volume information", "recycler" };
+        private static readonly HashSet<string> SpecialFolders = new HashSet<string> { "$recycle.bin", "system volume information", "recycler", "lost+found" };
 
 
         public RootFolderService(IBasicRepository<RootFolder> rootFolderRepository,