SPIGOT-2864: Make Arrow / Item setTicksLived behave like FallingBlock

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

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java

@@ -84,6 +84,14 @@ public class CraftArrow extends AbstractProjectile implements Arrow {
         getHandle().fromPlayer = EntityArrow.PickupStatus.a(status.ordinal());
     }
 
+    @Override
+    public void setTicksLived(int value) {
+        super.setTicksLived(value);
+
+        // Second field for EntityArrow
+        getHandle().despawnCounter = value;
+    }
+
     @Override
     public EntityArrow getHandle() {
         return (EntityArrow) entity;

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java

@@ -37,6 +37,14 @@ public class CraftItem extends CraftEntity implements Item {
         item.pickupDelay = Math.min(delay, Short.MAX_VALUE);
     }
 
+    @Override
+    public void setTicksLived(int value) {
+        super.setTicksLived(value);
+
+        // Second field for EntityItem
+        item.age = value;
+    }
+
     @Override
     public String toString() {
         return "CraftItem";