Preventing OutOfRangeArgument exception when login in windows phone

[mohdimas]

Not that sure if this happens to everyone, but I experienced crash whenever attempting OAuth in windows phone 8

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please let us know the company's name.

[chrsmith]

Sorry you ran into the bug. Your PR looks good. I just need you to sign the CLA and reply with "I signed it!"

Thank you for taking the time to submit the patch!

[mohdimas]

Ok I signed it. Thanks

[googlebot]

CLAs look good, thanks!

[chrsmith]

Thanks! This will be built and new packages will be published to NuGet in the next week or so.

[mohdimas]

Great, thanks! looking forward to it.

[chrisdunelm]

This is built, and the new packages are available on NuGet as version 1.13.1.*