---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 4/1/14 11:24 PM
Description: Updating screen events

java.lang.NullPointerException
	at dan200.computercraft.shared.turtle.items.ItemTurtleBase.func_77633_a(ItemTurtleBase.java:45)
	at net.minecraft.creativetab.CreativeTabs.func_78018_a(CreativeTabs.java:222)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74227_b(GuiContainerCreative.java:520)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73879_b(GuiContainerCreative.java:490)
	at net.minecraft.client.gui.GuiScreen.func_73867_d(SourceFile:132)
	at net.minecraft.client.gui.inventory.GuiContainer.func_73867_d(GuiContainer.java:1009)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73867_d(GuiContainerCreative.java:608)
	at net.minecraft.client.gui.GuiScreen.func_73862_m(SourceFile:107)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1566)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
	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:131)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at dan200.computercraft.shared.turtle.items.ItemTurtleBase.func_77633_a(ItemTurtleBase.java:45)
	at net.minecraft.creativetab.CreativeTabs.func_78018_a(CreativeTabs.java:222)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74227_b(GuiContainerCreative.java:520)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73879_b(GuiContainerCreative.java:490)
	at net.minecraft.client.gui.GuiScreen.func_73867_d(SourceFile:132)
	at net.minecraft.client.gui.inventory.GuiContainer.func_73867_d(GuiContainer.java:1009)
	at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73867_d(GuiContainerCreative.java:608)
	at net.minecraft.client.gui.GuiScreen.func_73862_m(SourceFile:107)