From face30d24e3f3bf2b6b0adaf66f73bf104f386aa Mon Sep 17 00:00:00 2001
From: David Vierra <codewarrior@hawaii.rr.com>
Date: Tue, 28 Sep 2010 16:03:50 -1000
Subject: [PATCH] avoid negative size here xxx do it better

---
 mclevel.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mclevel.py b/mclevel.py
index 858697a..3afd35c 100644
--- a/mclevel.py
+++ b/mclevel.py
@@ -839,6 +839,8 @@ class MCLevel:
             h -=y+h-self.Height
             y=self.Height-h
         
+        if h<=0: return
+        
         box.origin = x,y,z 
         box.size = w,h,l