Results of IDCT can by far outreach the range of ff_cropTbl[], leading
to overreads and potentially crashes.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Fix the fate ref for prores-422_proxy by reverting the changes to it
in commit f492df0927c42da174edb674857670fc50abc5dc
Signed-off-by: Janne Grunau <janne-libav@jannau.net>