Passing 0 to pxtorem causes exceptions

I have added those changes in this patch.

But for me , I was having issues in .div() function. ( NOTE: the node version to use in the issue summary can help others )
So , I tested by replacing div() to / locally, even though the logic is simple & should be effective in current implementation as well
but a proper review is needed.

I was thinking about the same code as Kaustab_Roy wrote, but than I realized that '0' can also be something like '0px' or maybe something else which equals to '0' (I don't know the code good enough to determine what values are possible). So I think just checking for '0' is not the solution for all, but I'm not sure.

There are no additional syntax options specifically for 0 in CSS. To handle a check on '0px' and make it functional.

Automatically closed - issue fixed for 2 weeks with no activity.