Missing assignment/recursion in UHLODProxy::FindFirstActor can potentially lead to an infinite loop

The body of if (SubLODActor) doesn't actually do anything, guaranteeing an infinite loop if the FirstActor is an ALodActor.

It looks like in the body of that if statement it should be looping through all sub ALODActors and a recursive call on each until it gets a non-ALODActor or nullptr.

const ALODActor* SubLODActor = Cast<ALODActor>(FirstActor);
if (SubLODActor)
{
    SubLODActor->SubActors.IsValidIndex(0) ? SubLODActor->SubActors[0] : nullptr;
}
else
{
    // Unable to find a valid actor
    FirstActor = nullptr;
}