fix bug again in check_accumulation()
fix bug again in check_accumulation()

yarocoder/dosenet-raspberrypi,bearing/dosenet-raspberrypi,yarocoder/dosenet-raspberrypi,cllamb0/dosenet-raspberrypi,bearing/dosenet-raspberrypi,cllamb0/dosenet-raspberrypi,tybtab/dosenet-raspberrypi,tybtab/dosenet-raspberrypi