[FFmpeg-cvslog] msmpeg4: Don't set up run-level info for level 0.

[Alex Converse]

ffmpeg | branch: master | Alex Converse <alex.converse at gmail.com> | Thu Nov  3 15:57:23 2011 -0700| [a1684cf82d1aa35de0ae97724477501f92395c2b] | committer: Alex Converse

msmpeg4: Don't set up run-level info for level 0.

run: The number of zero coefficients preceding a non-zero coefficient,
in the scan order. The absolute value of the non-zero coefficient is
called "level".

The run-level code makes illegal reads when trying to set up tables for
nonsense level 0.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a1684cf82d1aa35de0ae97724477501f92395c2b
---

 libavcodec/msmpeg4.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c
index 93191cc..84e6249 100644
--- a/libavcodec/msmpeg4.c
+++ b/libavcodec/msmpeg4.c
@@ -266,7 +266,7 @@ av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
 
         for(i=0; i<NB_RL_TABLES; i++){
             int level;
-            for(level=0; level<=MAX_LEVEL; level++){
+            for (level = 1; level <= MAX_LEVEL; level++) {
                 int run;
                 for(run=0; run<=MAX_RUN; run++){
                     int last;