Consistently say 'own' property

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index d20b34b07e26e587ef9e9e1e03637750fb1f8e33..859bc0d721cd84bd9ba5bdd86b011b06d59dff8b 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -1240,7 +1240,7 @@ var cyclic_error_marker = new $Object();
 function GetPropertyWithoutInvokingMonkeyGetters(error, name) {
   var current = error;
   // Climb the prototype chain until we find the holder.
-  while (current && !%HasLocalProperty(current, name)) {
+  while (current && !%HasOwnProperty(current, name)) {
     current = %GetPrototype(current);
   }
   if (IS_NULL(current)) return UNDEFINED;