Fix typo causing some oredict blocks to not be chiseleable in world

Closes #177

src/main/java/com/cricketcraft/chisel/api/ICarvable.java

@@ -1,11 +1,14 @@
 package com.cricketcraft.chisel.api;
 
-import net.minecraft.item.ItemStack;
-import net.minecraft.world.IBlockAccess;
-
 import com.cricketcraft.chisel.carving.CarvableHelper;
 import com.cricketcraft.chisel.carving.CarvableVariation;
 
+import net.minecraft.item.ItemStack;
+import net.minecraft.world.IBlockAccess;
+
+/**
+ * To be implemented on blocks that can be chiseled and need advanced metadata to variation mapping. Currently not very usable without internal classes.
+ */
 public interface ICarvable {
 
 	/**

src/main/java/com/cricketcraft/chisel/carving/Carving.java

@@ -112,7 +112,7 @@ public class Carving implements ICarvingRegistry {
 
 	@Override
 	public ICarvingGroup getGroup(Block block, int metadata) {
-		int[] ids = OreDictionary.getOreIDs(new ItemStack(block, metadata));
+		int[] ids = OreDictionary.getOreIDs(new ItemStack(block, 1, metadata));
 		if (ids.length > 0) {
 			for (int id : ids) {
 				ICarvingGroup oreGroup = groups.getGroupByOre(OreDictionary.getOreName(id));

src/main/java/com/cricketcraft/chisel/inventory/ContainerChisel.java

@@ -129,7 +129,7 @@ public class ContainerChisel extends Container {
 
 	public void onChiselSlotChanged() {
 		ItemStack stack = playerInventory.mainInventory[currentIndex];
-		if (!stack.isItemEqual(chisel))
+		if (stack == null || !stack.isItemEqual(chisel))
 			finished = true;
 
 		if (finished)