Fix to make access of canbus frames const correct. It's now not really possible to modify the captured canbus frames from outside the model class that holds them. This is safer and more future proof.

Boring update but it might save head scratching in the future.

frameplaybackwindow.h

@@ -27,7 +27,7 @@ class FramePlaybackWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit FramePlaybackWindow(QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent = 0);
+    explicit FramePlaybackWindow(const QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent = 0);
     ~FramePlaybackWindow();
 
 private slots:
@@ -57,7 +57,7 @@ private:
     Ui::FramePlaybackWindow *ui;
     QList<int> foundID;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
     int currentPosition;
     QTimer *playbackTimer;
     SerialWorker *serialWorker;