From b8996b14bcdf4de87a4b9bf8989e9b13f85a1823 Mon Sep 17 00:00:00 2001
From: LexManos <LexManos@gmail.com>
Date: Sat, 28 May 2016 20:53:19 -0700
Subject: [PATCH] Fixed EntityRegistry.addSpawn adding duplicate spawn entries.
 Closes #2112

---
 .../minecraftforge/fml/common/registry/EntityRegistry.java   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraftforge/fml/common/registry/EntityRegistry.java b/src/main/java/net/minecraftforge/fml/common/registry/EntityRegistry.java
index 9a68d4c1f..7cb57061c 100644
--- a/src/main/java/net/minecraftforge/fml/common/registry/EntityRegistry.java
+++ b/src/main/java/net/minecraftforge/fml/common/registry/EntityRegistry.java
@@ -234,6 +234,7 @@ public class EntityRegistry
         {
             List<SpawnListEntry> spawns = biome.getSpawnableList(typeOfCreature);
 
+            boolean found = false;
             for (SpawnListEntry entry : spawns)
             {
                 //Adjusting an existing spawn entry
@@ -242,11 +243,13 @@ public class EntityRegistry
                     entry.itemWeight = weightedProb;
                     entry.minGroupCount = min;
                     entry.maxGroupCount = max;
+                    found = true;
                     break;
                 }
             }
 
-            spawns.add(new SpawnListEntry(entityClass, weightedProb, min, max));
+            if (!found)
+                spawns.add(new SpawnListEntry(entityClass, weightedProb, min, max));
         }
     }