Important: always custom code should be added to disable error sounds because of SDL_ENABLEAPPEVENTS - after keys pressing (see code below "ADDED SO IT DOESN'T BEEP BECAUSE WE ENABLE SDL_ENABLEAPPEVENTS" comment).
git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@505 e016b1c5-ed68-44aa-a2f7-31cac88cffde