use case statement for image to prevent error on nil [fixes #175]
use case statement for image to prevent error on nil [fixes #175]

tarzan/onebox,techAPJ/onebox,tarzan/onebox,techAPJ/onebox,aceofspades/onebox,fantasticfears/onebox,discourse/onebox,aceofspades/onebox,techAPJ/onebox,billy3321/onebox,riking/onebox,tarzan/onebox,billy3321/onebox,billy3321/onebox,aceofspades/onebox,discourse/onebox