Respect despawn rate in merge check (#6428)

patches/server/0749-Respect-despawn-rate-in-item-merge-check.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Noah van der Aa <ndvdaa@gmail.com>
+Date: Wed, 18 Aug 2021 23:01:55 +0200
+Subject: [PATCH] Respect despawn rate in item merge check
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+index 158719d46c96bb733a00e08c8285f41a48406abf..063f3e4c67e6716c9a03dbe4b72eafd32e4f0d53 100644
+--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
++++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+@@ -262,7 +262,7 @@ public class ItemEntity extends Entity {
+     private boolean isMergable() {
+         ItemStack itemstack = this.getItem();
+ 
+-        return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < 6000 && itemstack.getCount() < itemstack.getMaxStackSize();
++        return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < this.getDespawnRate() && itemstack.getCount() < itemstack.getMaxStackSize(); // Paper - respect despawn rate in pickup check.
+     }
+ 
+     private void tryToMerge(ItemEntity other) {