Update v8 to bleeding_edge revision 3784
diff --git a/test/mjsunit/mjsunit.js b/test/mjsunit/mjsunit.js
index 8ced011..07c4e7e 100644
--- a/test/mjsunit/mjsunit.js
+++ b/test/mjsunit/mjsunit.js
@@ -75,6 +75,7 @@
   if (typeof a == "number" && typeof b == "number" && isNaN(a) && isNaN(b)) {
     return true;
   }
+  if (a == null || b == null) return false;
   if (a.constructor === RegExp || b.constructor === RegExp) {
     return (a.constructor === b.constructor) && (a.toString === b.toString);
   }