Handle the case where e.VirtualSystem is nil (#671)
Handle the case where e.VirtualSystem is nil (#671)


jrmycanady/govmomi,jrmycanady/govmomi,caglar10ur/govmomi,bruceadowns/govmomi,dougm/govmomi,jrmycanady/govmomi,dougm/govmomi,bruceadowns/govmomi,vmware/govmomi,vmware/govmomi,vmware/govmomi,bruceadowns/govmomi,dougm/govmomi,caglar10ur/govmomi,caglar10ur/govmomi