avcodec/hevc/ps: Check window parameters

Fixes: signed integer overflow: -1094995529 * 2 cannot be represented in type 'int'
Fixes: 484567435/clusterfuzz-testcase-minimized-ffmpeg_dem_HXVS_fuzzer-5628836988649472

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 82f097c825237219557a14918b74fa254121a6de)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>