Fix "illegal access" when calling parseInt with a radix that is not a smi.

src/v8natives.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 88 matching lines @@
     // vs 800ns).  The following optimization makes parseInt on a
     // non-Smi number 9 times faster (230ns vs 2070ns).  Together
     // they make parseInt on a string 1.4% slower (274ns vs 270ns).
     if (%_IsSmi(string)) return string;
     if (IS_NUMBER(string) &&
         ((0.01 < string && string < 1e9) ||
             (-1e9 < string && string < -0.01))) {
       // Truncate number.
       return string | 0;
     }
-    if (IS_UNDEFINED(radix)) radix = 0;
+    radix = radix || 0;
   } else {
     radix = TO_INT32(radix);
-    if (!(radix == 0 || (2 <= radix && radix <= 36)))
+    if (!(radix == 0 || (2 <= radix && radix <= 36))) {
       return $NaN;
+    }
   }
   string = TO_STRING_INLINE(string);
   if (%_HasCachedArrayIndex(string) &&
       (radix == 0 || radix == 10)) {
     return %_GetCachedArrayIndex(string);
   }
   return %StringParseInt(string, radix);
 }
 
 
@@ skipping 1266 matching lines @@
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();