Fix v8::Object::DeleteHiddenValue to not bail when there are no hidden proper...

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
===================================================================
--- test/cctest/test-api.cc	(revision 1686)
+++ test/cctest/test-api.cc	(working copy)
@@ -1293,6 +1293,9 @@
 
   i::Heap::CollectAllGarbage();
 
+  // Make sure delete of a non-existent hidden value works
+  CHECK(obj->DeleteHiddenValue(key));
+
   CHECK(obj->SetHiddenValue(key, v8::Integer::New(1503)));
   CHECK_EQ(1503, obj->GetHiddenValue(key)->Int32Value());
   CHECK(obj->SetHiddenValue(key, v8::Integer::New(2002)));