SPIGOT-7239: Getter/setter for player's enchantment seed

nms-patches/net/minecraft/world/entity/player/EntityHuman.patch

@@ -44,6 +44,15 @@
      protected int jumpTriggerTime;
      public float oBob;
      public float bob;
+@@ -158,7 +173,7 @@
+     public int experienceLevel;
+     public int totalExperience;
+     public float experienceProgress;
+-    protected int enchantmentSeed;
++    public int enchantmentSeed;
+     protected final float defaultFlySpeed = 0.02F;
+     private int lastLevelUpTime;
+     private final GameProfile gameProfile;
 @@ -169,6 +184,16 @@
      @Nullable
      public EntityFishingHook fishing;

src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java

@@ -465,6 +465,16 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
         return false;
     }
 
+    @Override
+    public int getEnchantmentSeed() {
+        return getHandle().enchantmentSeed;
+    }
+
+    @Override
+    public void setEnchantmentSeed(int i) {
+        getHandle().enchantmentSeed = i;
+    }
+
     @Override
     public int getExpToLevel() {
         return getHandle().getXpNeededForNextLevel();