servo/servo — pull request #3870 by mvanderh (2014-11-02 17:00:20+00:00)
Title: Initialize 'cancelable' to false in Event::new_inherited. 

Fixes #3855.

I'm not sure if this is the right place to set `cancelable`. If changing the default value in `Event::new_inherited` is not satisfactory, it will be possible to set the `Cell`'s value to `false` in `Event::new` itself.