Log Message:
Changes 1.2.14:
* Added cast macros for correct usage with C++:
	SDL_reinterpret_cast(type, expression)
	SDL_static_cast(type, expression)
* Added SDL_VIDEO_FULLSCREEN_DISPLAY as a preferred synonym for
  SDL_VIDEO_FULLSCREEN_HEAD on X11.
* Added SDL_DISABLE_LOCK_KEYS environment variable to enable normal
  up/down events for Caps-Lock and Num-Lock keys.