SimpleQuery._createSortQuerier sort comparator function is incorrect

[msssk]

https://github.com/SitePen/dstore/blob/v1.1.0/SimpleQuery.js#L172

If sorted is an empty array line 196 will always return 0, indicating that both items were equal, which may not be the case. And is actually not the case in Chrome, because Array#sort does not iterate over items in order. For arrays larger than a certain size (10?) it appears to use a half-interval algorithm, so data that was originally in a certain order will be changed to a different order with dstore's current logic.