Fix and update languages codes for Czech and Chinese.
DVDPlayerAudio: Present correct channel count
AESinkPULSE: Make cppcheck more happy
fix memory problems pointed out by valgrind in AE. See the PR comments for more details.
Merge pull request #5387 from fritsch/aepulsecppcheck

AESinkPULSE: Make cppcheck more happy
Merge pull request #5383 from fritsch/fixchannelinfo

DVDPlayerAudio: Present correct channel count
Merge pull request #5389 from jimfcarroll/ae-mem-fixes

fix memory problems pointed out by valgrind in AE.
DXVA-HD: return false if OpenProcessor fails
Merge pull request #5379 from ace20022/ces_zho

Fix and update languages codes for Czech and Chinese.
Merge pull request #5370 from FernetMenta/dxva

DXVA: fixes and rework
vaapi: flush ffmpeg buffers if it holds any refs on close
vaapi: drop unused member
renderer: bump number of buffers for vdpau and vaapi