CSS compiler fails finding correct path of certain font files

[rauwebieten]

Using font-awesome, I noticed the relative font paths were not converted to the new path.

Example URL:
url(../fonts/fontawesome-webfont.svg?v=4.7.0#fontawesomeregular)
The real path of this file is not found, so $css_asset_path is empty, and conversion has not taken place.

The query string in the URL (?v=...) makes it fail. The code should first strip all query-string and url-hash, before trying to find the real path.