From 3e9e0802f6df40ffa44f34d2059b2fbfbbbb1b23 Mon Sep 17 00:00:00 2001
From: cncolder <cncolder@gmail.com>
Date: Wed, 22 Dec 2010 15:15:05 +0800
Subject: [PATCH] Show null placeholder when the value is CPNull.

---
 AppKit/CPKeyValueBinding.j | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/AppKit/CPKeyValueBinding.j b/AppKit/CPKeyValueBinding.j
index 321b6889b..409ee7c14 100644
--- a/AppKit/CPKeyValueBinding.j
+++ b/AppKit/CPKeyValueBinding.j
@@ -231,7 +231,7 @@ var CPBindingOperationAnd = 0,
         aValue = [valueTransformer transformedValue:aValue];
 
 
-    if (aValue === undefined || aValue === nil)
+    if (aValue === undefined || aValue === nil || aValue === [CPNull null])
         aValue = [options objectForKey:CPNullPlaceholderBindingOption] || nil;
 
     return aValue;