update episode nfo saver

MediaBrowser.XbmcMetadata/Savers/EpisodeNfoSaver.cs

@@ -64,21 +64,21 @@ namespace MediaBrowser.XbmcMetadata.Savers
                 writer.WriteElementString("aired", episode.PremiereDate.Value.ToLocalTime().ToString(formatString));
             }
 
-            if (episode.AirsAfterSeasonNumber.HasValue && episode.AirsAfterSeasonNumber.Value != -1)
+            if (!episode.ParentIndexNumber.HasValue || episode.ParentIndexNumber.Value == 0)
             {
-                writer.WriteElementString("airsafter_season", episode.AirsAfterSeasonNumber.Value.ToString(UsCulture));
-            }
-            if (episode.AirsBeforeEpisodeNumber.HasValue && episode.AirsBeforeEpisodeNumber.Value != -1)
-            {
-                writer.WriteElementString("airsbefore_episode", episode.AirsBeforeEpisodeNumber.Value.ToString(UsCulture));
-            }
-            if (episode.AirsBeforeSeasonNumber.HasValue && episode.AirsBeforeSeasonNumber.Value != -1)
-            {
-                writer.WriteElementString("airsbefore_season", episode.AirsBeforeSeasonNumber.Value.ToString(UsCulture));
-            }
+                if (episode.AirsAfterSeasonNumber.HasValue && episode.AirsAfterSeasonNumber.Value != -1)
+                {
+                    writer.WriteElementString("airsafter_season", episode.AirsAfterSeasonNumber.Value.ToString(UsCulture));
+                }
+                if (episode.AirsBeforeEpisodeNumber.HasValue && episode.AirsBeforeEpisodeNumber.Value != -1)
+                {
+                    writer.WriteElementString("airsbefore_episode", episode.AirsBeforeEpisodeNumber.Value.ToString(UsCulture));
+                }
+                if (episode.AirsBeforeSeasonNumber.HasValue && episode.AirsBeforeSeasonNumber.Value != -1)
+                {
+                    writer.WriteElementString("airsbefore_season", episode.AirsBeforeSeasonNumber.Value.ToString(UsCulture));
+                }
 
-            if (episode.ParentIndexNumber.HasValue && episode.ParentIndexNumber.Value == 0)
-            {
                 if (episode.AirsBeforeEpisodeNumber.HasValue && episode.AirsBeforeEpisodeNumber.Value != -1)
                 {
                     writer.WriteElementString("displayepisode", episode.AirsBeforeEpisodeNumber.Value.ToString(UsCulture));
@@ -130,4 +130,4 @@ namespace MediaBrowser.XbmcMetadata.Savers
             return list;
         }
     }
-}
+}