It is accessed via AV_RN64A in ff_simple_idct_put_int32_10bit().
Should fix the UBSan failures in the mpeg4-simple-studio-profile
test here:
https://fate.ffmpeg.org/report.cgi?time=20240312011016&slot=ppc-linux-gcc-13.2-ubsan-altivec-qemuReviewed-by: Kieran Kunhya <kierank@obe.tv>
Tested-by: Sean McGovern <gseanmcg@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>