Unrated Users have Rating 0 for Performance Calculations

[Noobie99]

I do not know about live prediction calculations but at least for performance calculations after the contest is done, unrated users count as having rating 0 instead of the default rating of 1400.

I believe this is because the ratingChange api response returns rating 0 but the default rating is only used if the rating is null.

One possible fix would be to also use default rating if the rating is zero. There may be some false positives who actually have rating zero but they should be negligible, as there currently is no active user who has that rating. I tested this and it seems more accurate than before.