account for tracks with no title

Tdarr_Plugin_gabehf_Anime_Subtitle_Fixer.js

@@ -64,7 +64,10 @@ const plugin = (file, librarySettings, inputs, otherArguments) => {
         if (
           !convert && file.ffProbeData.streams[i].disposition.default === 0 && // not default
           languages.includes(file.ffProbeData.streams[i].tags.language) &&  // in preferred lang
-          !titles_to_avoid.some((s) => file.ffProbeData.streams[i].tags.title.toLowerCase().includes(s)) // not named 'forced' or 'signs & songs'
+          (
+            !file.ffProbeData.streams[i].tags.title ||
+            !titles_to_avoid.some((s) => file.ffProbeData.streams[i].tags.title.toLowerCase().includes(s))
+          ) // not named 'forced' or 'signs & songs', or has no title
         ) {
           convert = true;
           ffmpegCommandInsert += `-disposition:s:${subtitleIdx} default `;