Revert "MPCVideoDec: fixed playback h264 after "stop" on Intel HD Graphics (force recreate dxva decoder)."

This reverts commit 6d51fc694ab79ea51e530ba7eeab7ea3a548e9a8.

This caused many issues like green screen when starting playback.
Initialize variables in the constructor.
losslessly compress res/tickcross.png
typo
update lcms2 to 570d411
cosmetics
Cppcheck fixes:

* reduce variable scope
* remove unneeded variable assignments