vorbis: An additional defense in the Vorbis codec.

Fixes Bug: #190
Chromium Bug: #100543
Related to CVE-2011-3893

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit afb2aa537954db537d54358997b68f46561fd5a7)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit b0283ccb9e8945ce9e56f7c6ba0c676e7179d7a3)

Conflicts:

	libavcodec/vorbis_dec.c
(cherry picked from commit a5e0afe3c936220a793db0cdae04bb228f1904e0)

Conflicts:

	libavcodec/vorbis_dec.c
1 file changed