Merge commit 'ff3db937'

This commit is a no-op. As far as I can tell, we already added
checks, to address this CVE in 7c0b84d8,
which is also reflected in the CVE database:

    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2326

* commit 'ff3db937':
  asfenc: fix some possible integer overflows
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>