Fix up enchantment at the enchanting table vs via a book. Adds in a method

that previously exists under a new name: canApplyAtEnchantingTable()
to determine enchantments that can apply at the enchanting table (a smaller
subset of all possible enchantments for an item, now). Also, add your
enchantments to the anvil book application list, if neccessary.

patches/minecraft/net/minecraft/enchantment/Enchantment.java.patch

@@ -0,0 +1,40 @@
+--- ../src_base/minecraft/net/minecraft/enchantment/Enchantment.java
++++ ../src_work/minecraft/net/minecraft/enchantment/Enchantment.java
+@@ -1,6 +1,9 @@
+ package net.minecraft.enchantment;
+ 
+ import java.util.ArrayList;
++
++import com.google.common.collect.ObjectArrays;
++
+ import net.minecraft.entity.EntityLiving;
+ import net.minecraft.item.ItemStack;
+ import net.minecraft.util.DamageSource;
+@@ -205,6 +208,27 @@
+         return this.type.canEnchantItem(par1ItemStack.getItem());
+     }
+ 
++    /**
++     * This applies specifically to applying at the enchanting table. The other method {@link #func_92037_a(ItemStack)}
++     * applies for <i>all possible</i> enchantments.
++     * @param stack
++     * @return
++     */
++    public boolean canApplyAtEnchantingTable(ItemStack stack)
++    {
++        return this.type.canEnchantItem(stack.getItem());
++    }
++
++    /**
++     * Add to the list of enchantments applicable by the anvil from a book
++     *
++     * @param enchantment
++     */
++    public static void addToBookList(Enchantment enchantment)
++    {
++        ObjectArrays.concat(field_92038_c, enchantment);
++    }
++
+     static
+     {
+         ArrayList var0 = new ArrayList();

patches/minecraft/net/minecraft/enchantment/EnchantmentHelper.java.patch

@@ -5,7 +5,7 @@
              Enchantment var8 = var5[var7];
  
 -            if (var8 != null && (var8.type.canEnchantItem(var2) || var4))
-+            if (var8 != null && (var8.func_92037_a(par1ItemStack) || var4))
++            if (var8 != null && (var8.canApplyAtEnchantingTable(par1ItemStack) || var4))
              {
                  for (int var9 = var8.getMinLevel(); var9 <= var8.getMaxLevel(); ++var9)
                  {