SPIGOT-2989: Use existing horse inventory object.

By: md_5 <git@md-5.net>

paper-server/nms-patches/ContainerHorse.patch

@@ -1,10 +1,9 @@
 --- a/net/minecraft/server/ContainerHorse.java
 +++ b/net/minecraft/server/ContainerHorse.java
-@@ -1,11 +1,33 @@
+@@ -1,11 +1,31 @@
  package net.minecraft.server;
  
 +// CraftBukkit start
-+import org.bukkit.craftbukkit.inventory.CraftInventory;
 +import org.bukkit.craftbukkit.inventory.CraftInventoryView;
 +import org.bukkit.inventory.InventoryView;
 +// CraftBukkit end
@@ -24,8 +23,7 @@
 +            return bukkitEntity;
 +        }
 +
-+        CraftInventory inventory = new org.bukkit.craftbukkit.inventory.CraftInventoryHorse(this.a);
-+        return bukkitEntity = new CraftInventoryView(player.player.getBukkitEntity(), inventory, this);
++        return bukkitEntity = new CraftInventoryView(player.player.getBukkitEntity(), a.getOwner().getInventory(), this);
 +    }
 +
      public ContainerHorse(IInventory iinventory, final IInventory iinventory1, final EntityHorseAbstract entityhorseabstract, EntityHuman entityhuman) {