fix media type not being preserved when generated css
fix media type not being preserved when generated css

madeinqc/carto,gravitystorm/carto,pnorman/carto,1ec5/carto,mapbox/carto,midnightcomm/carto,stefanklug/carto,clhenrick/carto,CartoDB/carto,tomhughes/carto,CartoDB/carto,whitelynx/carto