Paper/patches/server/0334-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/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
index 42f541c609c3d94bee9b40b8e5307ad41a39c619..8c8d2e81f0866dc1441e181f2580852d87263bcc 100644
--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
@@ -516,7 +516,7 @@ public interface DispenseItemBehavior {
 
                 itemstack1 = CraftItemStack.asNMSCopy(event.getItem());
                 Vec3 vec3d = DispenseItemBehavior.getEntityPokingOutOfBlockPos(pointer, EntityType.FIREWORK_ROCKET, enumdirection);
-                FireworkRocketEntity entityfireworks = new FireworkRocketEntity(pointer.level(), stack, vec3d.x(), vec3d.y(), vec3d.z(), true);
+                FireworkRocketEntity entityfireworks = new FireworkRocketEntity(pointer.level(), itemstack1, vec3d.x(), vec3d.y(), vec3d.z(), true); // Paper - GH-2871 - fix last firework in stack having no effects when dispensed
 
                 entityfireworks.shoot((double) enumdirection.getStepX(), (double) enumdirection.getStepY(), (double) enumdirection.getStepZ(), 0.5F, 1.0F);
                 pointer.level().addFreshEntity(entityfireworks);