SECURITY UPDATE: double free in vpx_codec_enc_init_multi() when
encoder initialisation fails (ELSCVE-171705)
debian/patches/CVE-2025-5283.patch: release ownership of
mr_low_res_mode_info when vp8_create_compressor() fails so the
buffer is not freed twice, in vp8/vp8_cx_iface.c and
vpx/src/vpx_encoder.c.