Fix: root block's parameters could fail with BlocksRot == 1
Fix: root block's parameters could fail with BlocksRot == 1

duniter/duniter,duniter/duniter,duniter/duniter,blaurent49/duniter,blaurent49/duniter,duniter/duniter,blaurent49/duniter,blaurent49/duniter,duniter/duniter,duniter/duniter