From 64e67cc827d36f0a6af079ebc8185484d94e2f7e Mon Sep 17 00:00:00 2001
From: Aaron Griffith <aargri@gmail.com>
Date: Sun, 30 Oct 2011 18:06:28 -0400
Subject: [PATCH] fixed crash when SpawnY wasn't in [0, 128)

---
 overviewer_core/world.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 745106a..decede4 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -266,7 +266,13 @@ class World(object):
         ## The chunk that holds the spawn location 
         chunkX = spawnX/16
         chunkY = spawnZ/16
-
+        
+        ## clamp spawnY to a sane value, in-chunk value
+        if spawnY < 0:
+            spawnY = 0
+        if spawnY > 127:
+            spawnY = 127
+        
         try:
             ## The filename of this chunk
             chunkFile = self.get_region_path(chunkX, chunkY)