Implement OnError

app/src/main/java/de/danoeh/antennapod/activity/MediaplayerActivity.java

@@ -910,13 +910,17 @@ public abstract class MediaplayerActivity extends AppCompatActivity implements O
                 Observable.fromCallable(() -> DBReader.getFeedItem(feedItem.getId()))
                     .subscribeOn(Schedulers.newThread())
                     .observeOn(AndroidSchedulers.mainThread())
-                            .subscribe(item -> {
+                    .subscribe(
+                        item -> {
                             boolean isFav = item.isTagged(FeedItem.TAG_FAVORITE);
                             if (isFavorite != isFav) {
                                 isFavorite = isFav;
                                 invalidateOptionsMenu();
                             }
-                            });
+                        }, error -> {
+                            Log.e(TAG, Log.getStackTraceString(error));
+                        }
+                    );
             }
         }
     }