some music fixes

app/src/main/java/ru/vtosters/lite/music/cache/MusicCacheImpl.java

@@ -1,6 +1,7 @@
 package ru.vtosters.lite.music.cache;
 
 import android.os.RemoteException;
+import android.text.TextUtils;
 import bruhcollective.itaysonlab.libvkx.ILibVkxService;
 import bruhcollective.itaysonlab.libvkx.client.LibVKXClient;
 import bruhcollective.itaysonlab.libvkx.client.LibVKXClientImpl;
@@ -17,7 +18,7 @@ public class MusicCacheImpl {
                 track.y1(),
                 track.I != null ? track.I.getId() + "" : "-1",
                 track.f,
-                track.g,
+                !TextUtils.isEmpty(track.g) ? track.g : "",
                 track.C,
                 track.I != null ? track.I.getTitle() : "",
                 track.K,

app/src/main/java/ru/vtosters/lite/music/downloader/M3UDownloader.java

@@ -136,7 +136,7 @@ public class M3UDownloader
     }
 
     public static String getTitle(MusicTrack track) {
-        return track.f + (!TextUtils.isEmpty(track.g) ? +'(' + track.g + ')' : "");
+        return track.f + (!TextUtils.isEmpty(track.g) ? + '(' + track.g + ')' : "");
     }
 
     static File getTsesDir(MusicTrack track) {