Avoid duplicating the check for cairo MIME data support.
Avoid duplicating the check for cairo MIME data support.

jasco/WeasyPrint,prepare/TestWeasyPrint,Kozea/WeasyPrint,marclaporte/WeasyPrint,jasco/WeasyPrint,marclaporte/WeasyPrint,andrewleech/WeasyPrint,Kozea/WeasyPrint,prepare/TestWeasyPrint,andrewleech/WeasyPrint