check IntraBC displacement vector
Fixes a overlapping memcpy for dav1d-fuzzing-data:artifacts/crash-9550bf1d4b851a3a930394df4e2970d4eb50f47e.
Fixes a overlapping memcpy for dav1d-fuzzing-data:artifacts/crash-9550bf1d4b851a3a930394df4e2970d4eb50f47e.
VideoLAN code repository instance