Merge commit '522d850e'

* commit '522d850e':
  h264_cavlc: check the value of run_before

[10:00:09] <jamrial> michaelni: what do you think of libav commit
522d850e?
[10:00:45] <jamrial> it applies, but i can't reproduce the invalid
reads with the sample from the ticket mentioned in it
[10:52:57] <michaelni> jamrial, if theres an issue it should be fixed
by enlarging the scantable (as its faster) or maybe you can even drop
the if/else and use vlcs that are never returning a out of range
value. Id say the FFMIN is wrong in all cases, it should be a error
return if a check is added not silently continuing
[11:22:11] <michaelni> jamrial, i think the mb_padding stuff we have
makes it unneeded but we can possibly improve it beyond what we have

This commit is a noop
Merged-by: James Almer <jamrial@gmail.com>