Crash on iOS in AppleValidator.Validate with Arabic culture.

We found the following crash in receipt validation AppleValidator.Validate when the device is set to a specific language
(culture is ar-SA in this case).

Purchasing version: [1.23.1]
iOS with language set to Arabic
With a subscription receipt to validate

It seems to be an issue with non-invariant culture in parsing.
We used the following work around for this:

Code (CSharp):

1. CultureInfo culture = Thread.CurrentThread.CurrentCulture;
2. try {
3.     Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
4.     appleReceipt = m_Validator.Validate(receiptBytes);
5. } catch (System.Exception e) {
6.     // other error...
7. } finally {
8.     if (culture != null) {
9.         Thread.CurrentThread.CurrentCulture = culture;
10.     }
11. }