avfilter/vf_lut3d: check size in parse_dat()

Fixes CID1212261
Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
hevcdsp: add missing header include

Fixes make checkheaders

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
opencl: Make init_mtx static with volatile lock

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>