Fixed issue 697 allowing Object.create to be called with a function....

src/v8natives.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 642 matching lines @@
   // Property names are expected to be strings.
   for (var i = 0; i < propertyNames.length; ++i)
     propertyNames[i] = ToString(propertyNames[i]);
 
   return propertyNames;
 }
 
 
 // ES5 section 15.2.3.5.
 function ObjectCreate(proto, properties) {
-  if (!IS_OBJECT(proto) && !IS_NULL(proto)) {
+  // IS_OBJECT will return true on null covering that case.
+  if (!IS_OBJECT(proto) && !IS_FUNCTION(proto)) {
     throw MakeTypeError("proto_object_or_null", [proto]);
   }
   var obj = new $Object();
   obj.__proto__ = proto;
   if (!IS_UNDEFINED(properties)) ObjectDefineProperties(obj, properties);
   return obj;
 }
 
 
 // ES5 section 15.2.3.6.
@@ skipping 328 matching lines @@
 
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();