Micro-optimise seqno computation.
Micro-optimise seqno computation.

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