When 29713c5d changed most uses of `start_time` and `end_time` to `start_running_time` and `end_running_time`, it missed two. Fixes: 29713c5d40a1d7d1f21dada68f55f7a97f0b7025 Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1038 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1779>