Be more linient towards 0 length and NULL GStrings in base64 encode/decode.
Be more linient towards 0 length and NULL GStrings in base64 encode/decode.

noonien-d/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky