Paper/patches/server-unmapped/0397-Fix-last-firework-in-stack-not-having-effects-when-d.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 17 Jan 2020 18:44:55 -0800
Subject: [PATCH] Fix last firework in stack not having effects when dispensed
 - #2871

CB used the resulting item in the dispenser rather than the item
dispensed. The resulting item would have size == 0 and therefore
be convertered to air, hence why the effects disappeared.

diff --git a/src/main/java/net/minecraft/core/dispenser/IDispenseBehavior.java b/src/main/java/net/minecraft/core/dispenser/IDispenseBehavior.java
index 50911632341d1b861c00f01077cae43884147fe0..0055a96b51a1d38d31e129c417c97bcfc9d0b745 100644
--- a/src/main/java/net/minecraft/core/dispenser/IDispenseBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/IDispenseBehavior.java
@@ -427,7 +427,7 @@ public interface IDispenseBehavior {
                 }
 
                 itemstack1 = CraftItemStack.asNMSCopy(event.getItem());
-                EntityFireworks entityfireworks = new EntityFireworks(isourceblock.getWorld(), itemstack, isourceblock.getX(), isourceblock.getY(), isourceblock.getX(), true);
+                EntityFireworks entityfireworks = new EntityFireworks(isourceblock.getWorld(), itemstack1, isourceblock.getX(), isourceblock.getY(), isourceblock.getX(), true); // Paper - GH-2871 - fix last firework in stack having no effects when dispensed
 
                 IDispenseBehavior.a(isourceblock, entityfireworks, enumdirection);
                 entityfireworks.shoot((double) enumdirection.getAdjacentX(), (double) enumdirection.getAdjacentY(), (double) enumdirection.getAdjacentZ(), 0.5F, 1.0F);