Can't compile to empty .css

[minipai]

I want to write a .less as library for main less file to use, so I write all classes in the library.less with a variable like .class(@var:0){}, so that the classes wont be copied to main.less when I use @import "library".

However I found out that Less.app will give error when it tries to compile library.less, so I need to put a empty class to avoid it.

Not big deal but just a little inconvenient.

[lukeapage]

I can not reproduce this with the latest source.