From 9029e4c12c968d3fffd09bae70b1dca2cb5b5130 Mon Sep 17 00:00:00 2001
From: Mads Boddum <danish_cyborg@hotmail.com>
Date: Sat, 14 May 2016 19:40:00 +0200
Subject: [PATCH] Fixed an issue where a delta for CreatureObject.skills was
 sent regardless of modification and a concurrency issue

---
 src/resources/objects/creature/CreatureObject.java | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/resources/objects/creature/CreatureObject.java b/src/resources/objects/creature/CreatureObject.java
index 6f57146f5..5a393a76b 100644
--- a/src/resources/objects/creature/CreatureObject.java
+++ b/src/resources/objects/creature/CreatureObject.java
@@ -188,8 +188,11 @@ public class CreatureObject extends TangibleObject {
 	}
 	
 	public void addSkill(String skillName) {
-		skills.add(skillName);
-		skills.sendDeltaMessage(this);
+		synchronized(skills) {
+			if(skills.add(skillName)) {
+				skills.sendDeltaMessage(this);
+			}
+		}
 	}
 	
 	public boolean hasSkill(String skillName) {