Fix an implicit cast from int64 to double in the i18n extension

src/extensions/i18n/number-format.cc

 // Copyright 2013 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 130 matching lines @@
   number_format->parse(string_number, result, status);
   if (U_FAILURE(status)) {
     return;
   }
 
   switch (result.getType()) {
   case icu::Formattable::kDouble:
     args.GetReturnValue().Set(result.getDouble());
     return;
   case icu::Formattable::kLong:
-    args.GetReturnValue().Set(v8::Number::New(result.getLong()));
+    args.GetReturnValue().Set(result.getLong());
     return;
   case icu::Formattable::kInt64:
-    args.GetReturnValue().Set(v8::Number::New(result.getInt64()));
+    args.GetReturnValue().Set(static_cast<double>(result.getInt64()));
     return;
   default:
     return;
   }
 }
 
 void NumberFormat::JSCreateNumberFormat(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   if (args.Length() != 3 ||
       !args[0]->IsString() ||
@@ skipping 244 matching lines @@
       icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
   if (U_SUCCESS(status)) {
     resolved->Set(v8::String::New("locale"), v8::String::New(result));
   } else {
     // This would never happen, since we got the locale from ICU.
     resolved->Set(v8::String::New("locale"), v8::String::New("und"));
   }
 }
 
 }  // namespace v8_i18n