Flans Mod Crash

---- Minecraft Crash Report ----
 // This doesn't make any sense!

Time: 10.09.13 17:27
 Description: Rendering screen

java.lang.NullPointerException
 at co.uk.flansmods.common.ItemVehicle.func_77624_a(ItemVehicle.java:92)
 at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:662)
 at net.minecraft.client.gui.inventory.GuiContainer.func_74184_a(GuiContainer.java:226)
 at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74184_a
 (GuiContainerCreative.java:778)
 at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:202)
 at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(SourceFile:31)
 at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:683)
 at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1036)
 at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:934)
 at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:826)
 at net.minecraft.client.main.Main.main(SourceFile:101)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
 at net.minecraft.launchwrapper.Launch.main(Launch.java:18)