From cea0edfdb1502aea77c2d95155564c1890d01fef Mon Sep 17 00:00:00 2001
From: LexManos <LexManos@gmail.com>
Date: Sun, 2 Jun 2013 21:44:34 -0700
Subject: [PATCH] Ignore registration of a object that is already registered.
 Preventing duplicate callback invocations. Thanks King_Lemming for pointing
 this out.

---
 common/net/minecraftforge/event/EventBus.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/common/net/minecraftforge/event/EventBus.java b/common/net/minecraftforge/event/EventBus.java
index cce20e92fe..3fe149c44e 100644
--- a/common/net/minecraftforge/event/EventBus.java
+++ b/common/net/minecraftforge/event/EventBus.java
@@ -24,6 +24,11 @@ public class EventBus
     
     public void register(Object target)
     {
+        if (listeners.containsKey(target))
+        {
+            return;
+        }
+
         Set<? extends Class<?>> supers = TypeToken.of(target.getClass()).getTypes().rawTypes();
         for (Method method : target.getClass().getMethods())
         {