Prevent negative anger level for neutral mobs (#13504)

Author: Lulu13022002

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

@@ -64,7 +64,7 @@ public void setHasStung(boolean stung) {
 
     @Override
     public int getAnger() {
-        return (int) (this.getHandle().getPersistentAngerEndTime() - this.getHandle().level().getGameTime());
+        return (int) Math.max(this.getHandle().getPersistentAngerEndTime() - this.getHandle().level().getGameTime(), 0);
     }
 
     @Override

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

@@ -17,7 +17,7 @@ public ZombifiedPiglin getHandle() {
 
     @Override
     public int getAnger() {
-        return (int) (this.getHandle().getPersistentAngerEndTime() - this.getHandle().level().getGameTime());
+        return (int) Math.max(this.getHandle().getPersistentAngerEndTime() - this.getHandle().level().getGameTime(), 0);
     }
 
     @Override