SPIGOT-5474: Just ignore bugged fireball data

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

paper-server/nms-patches/EntityFireballFireball.patch

@@ -0,0 +1,19 @@
+--- a/net/minecraft/server/EntityFireballFireball.java
++++ b/net/minecraft/server/EntityFireballFireball.java
+@@ -18,7 +18,7 @@
+ 
+     public void b(ItemStack itemstack) {
+         if (itemstack.getItem() != Items.FIRE_CHARGE || itemstack.hasTag()) {
+-            this.getDataWatcher().set(EntityFireballFireball.f, SystemUtils.a((Object) itemstack.cloneItemStack(), (itemstack1) -> {
++            this.getDataWatcher().set(EntityFireballFireball.f, SystemUtils.a(itemstack.cloneItemStack(), (itemstack1) -> { // CraftBukkit - decompile error
+                 itemstack1.setCount(1);
+             }));
+         }
+@@ -50,6 +50,6 @@
+         super.a(nbttagcompound);
+         ItemStack itemstack = ItemStack.a(nbttagcompound.getCompound("Item"));
+ 
+-        this.b(itemstack);
++        if (!itemstack.isEmpty()) this.b(itemstack); // CraftBukkit - SPIGOT-5474 probably came from bugged earlier versions
+     }
+ }