Fix instance type check in apply optimization....

test/mjsunit/arguments-apply.js

Index: test/mjsunit/arguments-apply.js
===================================================================
--- test/mjsunit/arguments-apply.js	(revision 2256)
+++ test/mjsunit/arguments-apply.js	(working copy)
@@ -80,6 +80,13 @@
 assertTrue(this === NonObjectReceiver(void 0));
 
 
+function FunctionReceiver() {
+  return ReturnReceiver.apply(Object, arguments);
+}
+
+assertTrue(Object === FunctionReceiver());
+
+
 function ShadowApply() {
   function f() { return 42; }
   f.apply = function() { return 87; }