SPIGOT-5448: Shulker Boxes collapse empty slots when picked up

nms-patches/LootTable.patch

@@ -1,10 +0,0 @@
---- a/net/minecraft/server/LootTable.java
-+++ b/net/minecraft/server/LootTable.java
-@@ -39,6 +39,7 @@
-     public static Consumer<ItemStack> a(Consumer<ItemStack> consumer) {
-         return (itemstack) -> {
-             if (itemstack.getCount() < itemstack.getMaxStackSize()) {
-+                if (itemstack.isEmpty()) return; // CraftBukkit
-                 consumer.accept(itemstack);
-             } else {
-                 int i = itemstack.getCount();