on setting a black hole talisman to absorb redstone ore i get a crash to desktop, does not seem to happen with any other materials or seem to be due to having a large number of them in my inventory, each crash gives the same null pointer, only seems to occur when taliman is on:

java.lang.NullPointerException: Unexpected error
at net.minecraft.item.ItemStack.func_77977_a(ItemStack.java:361)
at vazkii.botania.common.item.ItemBlackHoleTalisman.func_77624_a(ItemBlackHoleTalisman.java:258)
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:525)
at vazkii.botania.client.core.handler.TooltipAdditionDisplayHandler.render(TooltipAdditionDisplayHandler.java:62)
at vazkii.botania.client.core.handler.ClientTickHandler.renderTick(ClientTickHandler.java:50)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_844_ClientTickHandler_renderTick_RenderTickEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at cpw.mods.fml.common.FMLCommonHandler.onRenderTickEnd(FMLCommonHandler.java:340)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1003)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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