ffmpeg: fix CVE-2025-1594

ffmpeg: fix CVE-2025-1594

A vulnerability, which was classified as critical, was found in FFmpeg up to 7.1.
This affects the function ff_aac_search_for_tns of the file libavcodec/aacenc_tns.c
of the component AAC Encoder. The manipulation leads to stack-based buffer overflow.
It is possible to initiate the attack remotely. The exploit has been disclosed to
the public and may be used.

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>