afmf-linux v1.2.0

Fixed

• A block of the picture with no detail to match (fog, snow, an open sky) used to keep whatever
  vector the coarser pyramid level handed it, because there every candidate matches about as
  well as any other and the match looked good enough to skip the search. The layer then warped
  the background with the motion of whatever was next to it, which is what smeared a moving
  silhouette over its surroundings. A block now keeps a vector only with evidence for it: the
  prediction has to match at least twice as well as staying put, and so does the winner of the
  search, at every pyramid level; otherwise the block stores the zero vector. The search's cost
  is unchanged, both sums travelling in one word.