am 5b7ea014: (-s ours) am e7b2845d: Merge "DO NOT MERGE return an error when Surface::lock() is called while the surface is already locked." into eclair-mr2

Merge commit '5b7ea0146dcfd5564d894d4cf0104919775feb36'

* commit '5b7ea0146dcfd5564d894d4cf0104919775feb36':
  DO NOT MERGE