check tmdb id in fanart provider

MediaBrowser.Providers/Movies/FanArtMovieProvider.cs

@@ -229,28 +229,23 @@ namespace MediaBrowser.Providers.Movies
         {
             cancellationToken.ThrowIfCancellationRequested();
 
-            BaseProviderInfo data;
-
-            if (!item.ProviderData.TryGetValue(Id, out data))
-            {
-                data = new BaseProviderInfo();
-                item.ProviderData[Id] = data;
-            }
-
             var movieId = item.GetProviderId(MetadataProviders.Tmdb);
 
-            var movieDataPath = GetMovieDataPath(ConfigurationManager.ApplicationPaths, movieId);
-            var xmlPath = Path.Combine(movieDataPath, "fanart.xml");
-
-            // Only download the xml if it doesn't already exist. The prescan task will take care of getting updates
-            if (!File.Exists(xmlPath))
+            if (!string.IsNullOrEmpty(movieId))
             {
-                await DownloadMovieXml(movieDataPath, movieId, cancellationToken).ConfigureAwait(false);
-            }
+                var movieDataPath = GetMovieDataPath(ConfigurationManager.ApplicationPaths, movieId);
+                var xmlPath = Path.Combine(movieDataPath, "fanart.xml");
 
-            if (File.Exists(xmlPath))
-            {
-                await FetchFromXml(item, xmlPath, cancellationToken).ConfigureAwait(false);
+                // Only download the xml if it doesn't already exist. The prescan task will take care of getting updates
+                if (!File.Exists(xmlPath))
+                {
+                    await DownloadMovieXml(movieDataPath, movieId, cancellationToken).ConfigureAwait(false);
+                }
+
+                if (File.Exists(xmlPath))
+                {
+                    await FetchFromXml(item, xmlPath, cancellationToken).ConfigureAwait(false);
+                }
             }
 
             SetLastRefreshed(item, DateTime.UtcNow);