cabana: fix potential dangling pointer Issue (#32672)

Fix Potential Dangling Pointer Issue

tools/cabana/videowidget.cc

@@ -151,7 +151,7 @@ QWidget *VideoWidget::createCameraWidget() {
   setMaximumTime(can->totalSeconds());
   QObject::connect(slider, &QSlider::sliderReleased, [this]() { can->seekTo(slider->currentSecond()); });
   QObject::connect(slider, &Slider::updateMaximumTime, this, &VideoWidget::setMaximumTime, Qt::QueuedConnection);
-  QObject::connect(can, &AbstractStream::eventsMerged, [this]() { slider->update(); });
+  QObject::connect(can, &AbstractStream::eventsMerged, this, [this]() { slider->update(); });
   QObject::connect(static_cast<ReplayStream*>(can), &ReplayStream::qLogLoaded, slider, &Slider::parseQLog);
   QObject::connect(cam_widget, &CameraWidget::clicked, []() { can->pause(!can->isPaused()); });
   QObject::connect(cam_widget, &CameraWidget::vipcAvailableStreamsUpdated, this, &VideoWidget::vipcAvailableStreamsUpdated);