fix 0th newvent counting as a valid vent event, refers #156
fix 0th newvent counting as a valid vent event, refers #156

MIT-LCP/mimic-code,fereshteh-razmi/mimic-code,fereshteh-razmi/mimic-code,MIT-LCP/mimic-code,MIT-LCP/mimic-code,MIT-LCP/mimic-code-sharing,MIT-LCP/mimic-code-sharing,fereshteh-razmi/mimic-code