Little issue with mixins

[zouloux]

Hi there,
Thanks for this plugin, really handy ! I use it to have the same breakpoint values between my CSS and JS.

Anyway, i encountered an issue with mixins. I think this is maybe due to a Less lib update.

When I have a mixin :

.testMixin
{
}

grunt is telling me this : Warning: Cannot read property 'substr' of undefined Use --force to continue.

So I checked the source code and the only substr is here :
https://github.com/ixrock/grunt-less2js/blob/master/tasks/less2js.js#L58

When checking rule.variable on mixins this is true because rule.variable is a function. But when calling rule.name.substr(1) this is crashing.

Maybe adding : rule.variable == true can solve the issue ?

What do you think ?
Thanks :)

[ixrock]

Hi! I don't maintain it anymore. If you can fix this, please fork the repo and make PR.