Remove unsigned 0 comparison
Remove unsigned 0 comparison

yuryleb/osrm-backend,yuryleb/osrm-backend,yuryleb/osrm-backend,Project-OSRM/osrm-backend,yuryleb/osrm-backend,frodrigo/osrm-backend,Project-OSRM/osrm-backend,frodrigo/osrm-backend,Project-OSRM/osrm-backend,Project-OSRM/osrm-backend,frodrigo/osrm-backend,frodrigo/osrm-backend