am 85ade33e: fix [2071412] work around mdp 32-bits fade limitation

Merge commit '85ade33edcc7d9be462ad7b8455d27f6654aca5e' into eclair-mr2

* commit '85ade33edcc7d9be462ad7b8455d27f6654aca5e':
  fix [2071412] work around mdp 32-bits fade limitation