am ac774d53: am eda49b16: am 3f79dbfc: am d77786c6: am a6c650a9: am 436b32d1: am d2605273: Ogg: avoid size_t overflow in base64 decoding

* commit 'ac774d53fff5a580b9fe41ac4a7c6bb96b5137ef':
  Ogg: avoid size_t overflow in base64 decoding