remove extra copying for binary blobs in sqlite backend
remove extra copying for binary blobs in sqlite backend

adding extra copies for no reason, even if it might save the user a little work in some cases, is not a great idea

gfriloux/esskyuehl,gfriloux/esskyuehl,carloslack/esskyuehl,expertisesolutions/esskyuehl,carloslack/esskyuehl,expertisesolutions/esskyuehl,expertisesolutions/esskyuehl,carloslack/esskyuehl