Ensure that the length property of bound functions are actual unique

src/v8natives.js

Index: src/v8natives.js
===================================================================
--- src/v8natives.js	(revision 8796)
+++ src/v8natives.js	(working copy)
@@ -1499,9 +1499,9 @@
 
   // Set the correct length.
   var length = (this.length - argc_bound) > 0 ? this.length - argc_bound : 0;
-  %FunctionSetLength(result, length);
   %FunctionRemovePrototype(result);
   %FunctionSetBound(result);
+  %BoundFunctionSetLength(result, length);
   return result;
 }