Fix another typo in computation of advertised metrics.
Fix another typo in computation of advertised metrics.

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