[AI] SmartObjectSlot does not have a valid node ref even when it should project to navigation.

If you request a SmartObject slot entrance location and require it to be navigable, it will return a result that does not include the node ref of the nav poly for the entrance to the slot. Instead it returns INVALID_NAVNODEREF.

It seems that the NodeRef for the result is never set inside of USmartObjectSubsystem::QueryValidatedSlotEntranceLocationsInternal to be the found location. It always sets NodeRef to be INVALID_NAVNODEREF.

1. Open map with valid SmartObjects that have entrance locations setup.
2. Create a FSmartObjectSlotEntranceLocationRequest
   1. EntryRequest.UserActor = OwnerPawn;
      EntryRequest.SearchLocation = OwnerPawn->GetActorLocation();
      EntryRequest.bUseSlotLocationAsFallback = true;
      EntryRequest.bProjectNavigationLocation = true;
      EntryRequest.bTraceGroundLocation = false;
      EntryRequest.bCheckTransitionTrajectory = false;
      EntryRequest.bCheckEntranceLocationOverlap = false;
3. Call SmartObjectSubsystem->FindEntranceLocationForSlot
4. Check that Result.NavNodeRef != 0 with printing or attaching a debugger.