Determination of $relative_file_path

Hi,

I installed live css - kept running into an error when pressing Save. The module was trying to write to a path that didn't exist.

$absolute_dir = /Applications/MAMP/htdocs/Henrietta/git-7/sites/mysite.org/modules/live_css
$relative_dir = sites/mysite.local/modules/live_css

So in this case chopping of the drupal_strlen($relative_dir) + 1 from the $absolute_dir chops of two characters too many - as mysite.local is 2 characters longer than mysite.com

I solved this for us (we use symlinks a lot on both local and production) by using:

$basepath = preg_split("/sites/", $absolute_dir);
return($basepath[0]);

As this function live_css_document_root() is really just trying to figure out what is in front of the /sites/, right? Or are there cases I'm not thinking of right now?

Thanks for this module - super useful to give people access to their CSS without having to give them e.g. any SSH privileges to the server.