ChrisYip/Better-CSS-Syntax-for-Vim — pull request #13 by amadeus (2013-06-19 05:11:47+00:00)
Title: Fixing compatibility with default CSS syntax file

There's a bug if the default CSS syntax file is loaded after this one,
it clobbers the regexes and creates buggy syntax highlighting.

Adding b:current_syntax stops the default css syntax file from
executing if it is loaded after this one.

I originally discovered this issue because I use Vundle package manager.