Fix unitless zero values

[dennisfrank]

This fixes #7 and should be also related to postcss/postcss-calc#28.

[MoOx]

This might be considered as a breaking change, which annoys me. Maybe this should not be the default?
Can't you fix the sass mixins instead? Cause it's weird to deoptimize this reducer.

[dennisfrank]

Hm. But zero values without a value are breaking calc(). Browsers don't calculate it at all.

Check out this simplified example:

http://jsbin.com/punivivipo/edit?html,css,output

[MoOx]

Another WTF CSS :'(.
So will merge and release as a patch.

[dennisfrank]

Yeah. It makes no sense. :(

[MoOx]

Released as 1.2.4

[Dylan-Chapman]

So, what can be done about scenarios where we have something like width: calc(99.99% * 1/1 - 0rem); that can be reduced? This change breaks it from reducing down to simply width: 99.99%. I'd change the output manually if I could, but this is resulting code from Lost grid.

[MoOx]

What about fixing the code generated by Lost grid?