fix @return; scss error when `gulp sass`
fix @return; scss error when `gulp sass`

saitodisse/dillinger,WhoRain/new,joemccann/dillinger,jiusanzhou/dillinger,jiusanzhou/dillinger,jiusanzhou/dillinger,WhoRain/new,run-project/dillinger,joemccann/dillinger,saitodisse/dillinger,joemccann/dillinger,benjamin-albert/dillinger,run-project/dillinger,benjamin-albert/dillinger