Strictly speaking, no. The reason for this, is that I added a [list of default values](https://github.com/mozilla/pdf.js/pull/3958/files#diff-927e59fd74b25cf9d6226eaa93b02108R21) in `view_history.js`, so that you wouldn't have to pass in defaults on `get`. I can revert this if you like, it should actually reduce the number of lines in this patch even more!