Fix assertSame for unit testing harness.

test/mjsunit/mjsunit.js

Index: test/mjsunit/mjsunit.js
diff --git a/test/mjsunit/mjsunit.js b/test/mjsunit/mjsunit.js
index faa5a43829a69f3dedbd39f3c524e6884f62e8fe..6f6e3230d57fa27265db8a74dca11168f2aa3682 100644
--- a/test/mjsunit/mjsunit.js
+++ b/test/mjsunit/mjsunit.js
@@ -223,7 +223,7 @@ var assertUnreachable;
   assertSame = function assertSame(expected, found, name_opt) {
     if (found === expected) {
       if (expected !== 0 || (1 / expected) == (1 / found)) return;
-    } else if (isNaN(expected) && isNaN(found)) {
+    } else if ((expected !== expected) && (found !== found)) {

[rossberg, 2011/10/28 09:05:18]

Somebody should pull IEEE to court for their NaN semantics.
Somebody should also pull to court the person responsible for the semantics of
isNaN in JavaScript.

       return;
     }
     fail(PrettyPrint(expected), found, name_opt);