Fixed: Use empty string when {Original Title} is not available

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderFixture.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -615,5 +616,17 @@ namespace NzbDrone.Core.Test.OrganizerTests
             Subject.BuildFileName(new List<Episode> { _episode1 }, _series, _episodeFile)
                    .Should().Be("Venture.Bros.15x06");
         }
+
+        [Test]
+        public void should_use_empty_string_instead_of_null_when_scene_name_is_not_available()
+        {
+            _namingConfig.RenameEpisodes = true;
+            _namingConfig.StandardEpisodeFormat = "{Original Title}";
+
+            _episodeFile.SceneName = null;
+
+            Subject.BuildFileName(new List<Episode> { _episode1 }, _series, _episodeFile)
+                   .Should().Be(String.Empty);
+        }
     }
 }

src/NzbDrone.Core/Organizer/FileNameBuilder.cs

@@ -398,7 +398,7 @@ namespace NzbDrone.Core.Organizer
 
         private void AddEpisodeFileTokens(Dictionary<String, Func<TokenMatch, String>> tokenHandlers, Series series, EpisodeFile episodeFile)
         {
-            tokenHandlers["{Original Title}"] = m => episodeFile.SceneName;
+            tokenHandlers["{Original Title}"] = m => episodeFile.SceneName ?? String.Empty;
             tokenHandlers["{Release Group}"] = m => episodeFile.ReleaseGroup ?? "DRONE";
             tokenHandlers["{Quality Title}"] = m => GetQualityTitle(series, episodeFile.Quality);
         }