Don't call gettime in parse_packets if timestamps are not enabled.
Don't call gettime in parse_packets if timestamps are not enabled.

tcatm/babeld,dtaht/babeld-shortrtt-metrics,woniullb/babeld,wlanslovenija/babeld,Gwendocg/babeldToS,jech/babeld,sudomesh/babeld,wlanslovenija/babeld,jech/babeld,boutier/babeld,Drooids/babeld,Gwendocg/babeldToS