mishoo/UglifyJS2 — pull request #388 by getify (2013-12-30 14:27:09+00:00)
Title: Option: rewrite `null` to `0` if it's in the `this` parameter position of `call/apply/bind` invocations

Per issue #385, adding a `null_this` option (default: false) for rewriting `null` to `0` in `call/apply/bind`.