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java.lang.NullPointerException: Updating screen events	at lance5057.tDefense.core.tools.modifiers.Thaumcraft.modifierRepairVis.matches(modifierRepairVis.java:32)	at tconstruct.library.crafting.ModifyBuilder.modifyItem(ModifyBuilder.java:25)	at tconstruct.tools.logic.ToolForgeLogic.buildTool(ToolForgeLogic.java:49)	at tconstruct.tools.logic.ToolStationLogic.func_70296_d(ToolStationLogic.java:65)	at net.minecraft.inventory.Slot.func_75218_e(Slot.java:83)	at net.minecraft.inventory.Slot.func_75215_d(Slot.java:78)	at cofh.lib.util.helpers.InventoryHelper.mergeItemStack(InventoryHelper.java:360)	at net.minecraft.inventory.Container.func_75135_a(SourceFile)	at tconstruct.tools.inventory.ToolStationContainer.func_82846_b(ToolStationContainer.java:119)	at net.minecraft.inventory.Container.func_75144_a(SourceFile:193)	at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(Unknown Source)	at codechicken.nei.guihook.GuiContainerManager.handleSlotClick(GuiContainerManager.java:504)	at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:638)	at net.minecraft.client.gui.inventory.GuiContainer.public_func_146984_a(GuiContainer.java)	at codechicken.nei.guihook.DefaultSlotClickHandler.callHandleMouseClick(DefaultSlotClickHandler.java)	at codechicken.nei.guihook.DefaultSlotClickHandler.handleSlotClick(DefaultSlotClickHandler.java:17)	at codechicken.nei.guihook.GuiContainerManager.handleMouseClick(GuiContainerManager.java:453)	at net.minecraft.client.gui.inventory.GuiContainer.managerHandleMouseClick(GuiContainer.java)	at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:394)	at tconstruct.tools.gui.ToolStationGui.func_73864_a(ToolStationGui.java:69)	at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:296)	at net.minecraft.client.gui.inventory.GuiContainer.func_146274_d(GuiContainer.java)	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1640)	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)	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(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:135)	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)