From c50dfa559693664b707ca83a67da268e9959a8e4 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Mon, 3 May 2010 22:19:09 -0600
Subject: Don't apply object modifiers to a NULL CSG object.

---
 dimension/realize.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dimension/realize.c b/dimension/realize.c
index 8a1f024..aa019ed 100644
--- a/dimension/realize.c
+++ b/dimension/realize.c
@@ -915,7 +915,8 @@ dmnsn_realize_csg(dmnsn_astnode astnode, dmnsn_array *lights,
     }
   }
 
-  dmnsn_realize_object_modifiers(modifiers, csg);
+  if (csg)
+    dmnsn_realize_object_modifiers(modifiers, csg);
   return csg;
 }
 
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