- Nash's force fake contrast submission.
Fixed crash in game controller support code

Joystick's startup and shutdown (of Native OS X backend) can be called more than once
Read script number as signed when parsing SARY chunks

- Fixed: Script arrays didn't work in named scripts because the loader
  read the script number as an unsigned word, hence it would never find
  named scripts, since they are stored with negative numbers.
Merge branch 'master' of https://github.com/rheit/zdoom
Clamp chase_dist and chase_height because integer overflow is a thing.
Merge branch 'master' of github.com:rheit/zdoom