Fix unhandlified value in GetOwnProperty function.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index b508ad3e995ed3f3a39454e69fe1633c41b88214..6a460e2412094dc2ec1fc5b7c2a02f38998b7f56 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -1098,14 +1098,14 @@ static MaybeObject* GetOwnProperty(Isolate* isolate,
 
   PropertyAttributes attrs = obj->GetLocalPropertyAttribute(*name);
   if (attrs == ABSENT) return heap->undefined_value();
-  AccessorPair* accessors = obj->GetLocalPropertyAccessorPair(*name);
+  Handle<AccessorPair> accessors(obj->GetLocalPropertyAccessorPair(*name));
 
   Handle<FixedArray> elms = isolate->factory()->NewFixedArray(DESCRIPTOR_SIZE);
   elms->set(ENUMERABLE_INDEX, heap->ToBoolean((attrs & DONT_ENUM) == 0));
   elms->set(CONFIGURABLE_INDEX, heap->ToBoolean((attrs & DONT_DELETE) == 0));
-  elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(accessors != NULL));
+  elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(!accessors.is_null()));
 
-  if (accessors == NULL) {
+  if (accessors.is_null()) {
     elms->set(WRITABLE_INDEX, heap->ToBoolean((attrs & READ_ONLY) == 0));
     // GetProperty does access check.
     Handle<Object> value = GetProperty(obj, name);