Don't read from playlist if nothing there.

src/minimediaplayer.cpp

@@ -107,7 +107,11 @@ QList<QString> MiniMediaPlayer::getTrackNames()
 QMap<QString, qint64> MiniMediaPlayer::currentState()
 {
     QMap<QString,qint64> state;
+    if(playlist.size() < 1) {
+        state.insert("duration",0);
+    } else {
         state.insert("duration",playlist.first().trackLength);
+    }
     state.insert("position",m_player->position());
     state.insert("state",isPlaying());
     return state;