Don't crash when long-pressing on a stream.
diff --git a/src/com/android/music/MediaPlaybackActivity.java b/src/com/android/music/MediaPlaybackActivity.java
index 1273a35..478ae0b 100644
--- a/src/com/android/music/MediaPlaybackActivity.java
+++ b/src/com/android/music/MediaPlaybackActivity.java
@@ -289,6 +289,11 @@
             // not music
             return false;
         }
+
+        if (audioid < 0) {
+            return false;
+        }
+
         Cursor c = MusicUtils.query(this,
                 ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, audioid),
                 new String[] {MediaStore.Audio.Media.IS_MUSIC}, null, null, null);