Waypoint 12 - Fix to VisitedSystem co-ords
Waypoint 12 - Fix to VisitedSystem co-ords

Items in DB had 0,0,0 as their position as an invalid marker, screen
them out..

jgoode/EDDiscovery,mwerle/EDDiscovery,jthorpe4/EDDiscovery,vendolis/EDDiscovery,vendolis/EDDiscovery,mwerle/EDDiscovery,jeoffman/EDDiscovery,jgoode/EDDiscovery,jeoffman/EDDiscovery