7aa24b157dedf39dadade9b0d59071574f6580da

The buffer size and pointer were not checked prior to testing the first
byte of the buffer. These were sometimes checked before calling, but it is
better to add it inside the function as it takes buf and size arguments.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>
(cherry picked from commit 715f259bf9
)
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * See the LICENSE file.
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