Regression test for ecma 15.1.2.6, fix bug number

js/tests/ecma/GlobalObject/15.1.2.6.js

@@ -50,7 +50,7 @@
 var SECTION = "15.1.2.6";
 var VERSION = "ECMA_1";
 var TITLE   = "isNaN( x )";
-var BUGNUMBER = "77391";
+var BUGNUMBER = "none";
 
 startTest();