[Issue,1.4.8] ExtendedBuyableVehicle throws NullReferenceException if secondaryPrefab is left blank.

[ScandalTheVandal]

I've been messing around with the ExtendedBuyableVehicles and noticed that if you do not assign a secondaryPrefab (which is used for the clipboard on the vanilla Company Cruiser) LLL will throw a NullReferenceException error (shown in the photo below)

The vehicle will still work regardless of this; what I assume is happening is that there's no safeguard in place to check if secondaryPrefab exists (during network registering?); (the item dropship for example does this - if (this.terminalScript.buyableVehicles[this.terminalScript.orderedVehicleFromTerminal].secondaryPrefab != null), so even if you don't include a secondaryPrefab it will still be able to deliver the vehicle)