fix movie fallback metadata (#302)

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Fixed
+- Fix bug preventing ingestion of local movies with fallback metadata (without NFO files)
 
 ## [0.0.49-prealpha] - 2021-07-11
 ### Added

ErsatzTV.Core/Metadata/FallbackMetadataProvider.cs

@@ -168,6 +168,8 @@ namespace ErsatzTV.Core.Metadata
                     metadata.Tags = new List<Tag>();
                     metadata.Studios = new List<Studio>();
                     metadata.Actors = new List<Actor>();
+                    metadata.Directors = new List<Director>();
+                    metadata.Writers = new List<Writer>();
                     metadata.DateUpdated = DateTime.UtcNow;
                 }
             }