Avoid OOB reads in nal parsing.

README.chromium

Index: README.chromium
===================================================================
--- README.chromium	(revision 120628)
+++ README.chromium	(working copy)
@@ -71,6 +71,7 @@
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/52_vorbis_fix_floor1_vector_int_overflow.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/53_matroska_codec_config.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/54_mov_stss.patch
+       patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/55_h264_nal.patch
        cd ..
 
 
@@ -378,6 +379,14 @@
        diff -wurp -N orig ffmpeg
        diff -wurp -N orig ffmpeg >patches/to_upstream/54_mov_stss.patch
 
+       rm -rf orig
+       cp -R ffmpeg orig
+       cd ffmpeg
+       patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/55_h264_nal.patch
+       cd ..
+       diff -wurp -N orig ffmpeg
+       diff -wurp -N orig ffmpeg >patches/to_upstream/55_h264_nal.patch
+
 Testing
   Updates should be tested against
   a) http://wiki.xiph.org/TheoraTestsuite