annoying error on events over elements without class names

[Sigfried]

Maybe this isn't bothering anyone else because people don't usually use the SVG renderer, but when I have DOM elements inside a node that don't have class names, sigma.misc.bindDOMEvents.js line 36 gives an error. Instead of

 return !!~this.class.indexOf(self.settings('classPrefix') + '-node');

it could be

 return this.class && !!~this.class.indexOf(self.settings('classPrefix') + '-node');

Should I just put in a pull request or is there some reason my fix is inadvisable?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.