From 1d5196cd7044dc601f2b63b90d226a846cb82352 Mon Sep 17 00:00:00 2001
From: Matthias Richter <vrld@vrld.org>
Date: Sun, 22 Jul 2012 12:13:10 +0200
Subject: [PATCH] Fix #18: Invalid check for class-commons.

---
 shapes.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shapes.lua b/shapes.lua
index 6e9ed2d..493e90a 100644
--- a/shapes.lua
+++ b/shapes.lua
@@ -27,7 +27,7 @@ THE SOFTWARE.
 local math_min, math_sqrt, math_huge = math.min, math.sqrt, math.huge
 
 local _PACKAGE = (...):match("^(.+)%.[^%.]+")
-if not common and common.class then
+if not (common and common.class and common.instance) then
 	class_commons = true
 	require(_PACKAGE .. '.class')
 end