SPIGOT-6580: Cancelling SlimeSplitEvent Causes Infinite Loop

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

paper-server/nms-patches/net/minecraft/world/entity/monster/EntitySlime.patch

@@ -35,7 +35,7 @@
 +            if (!event.isCancelled() && event.getCount() > 0) {
 +                k = event.getCount();
 +            } else {
-+                super.die();
++                super.a(entity_removalreason);
 +                return;
 +            }
 +            List<EntityLiving> slimes = new ArrayList<>(j);