am 641300a8: Don\'t draw transparent regions in a 9 patch.

Merge commit '641300a8b61bff44562e945c1e8b2714cc3aece5' into gingerbread-plus-aosp

* commit '641300a8b61bff44562e945c1e8b2714cc3aece5':
  Don't draw transparent regions in a 9 patch.