vp8: fix bilinear C code to work if src_stride != dst_stride.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vp8: fix bilinear C code to work if src_stride != dst_stride.

See: 34b429d5ba7b823748e897f0295aa78aaa2ebb9d
Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc_filter: assert validity of qp predictor input

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: clear tab_slice_address in hevc_frame_start()

Fixes inconsistencies
Fixes use of uninitilaized memory
Fixes part of  cb307d24befbd109c6f054008d6777b5/asan_static-oob_124a175_1445_cov_2355279992_DBLK_D_VIXS_1.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: clear tab_slice_address of ctb on error.

This allows us to detect which areas have failed to decode

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: hls_decode_entry: check that the previous slice segment is available before decoding the next

Fixes use of uninitialized memory
Fixes out of array read
Fixes assertion failure
Fixes part of cb307d24befbd109c6f054008d6777b5/asan_static-oob_124a175_1445_cov_2355279992_DBLK_D_VIXS_1.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>