When the last window is closed and the SDL_WINDOWEVENT_CLOSE event is sent, send the SDL_QUIT event. Common.c now destroys the SDL_Window upon a SDL_WINDOWEVENT_CLOSE event to ensure that all windows get closed properly and the new code to handle the last window closes gets executed.

/*
 *	common.h
 *	written by Holmes Futrell
 *	use however you want
 */

#define SCREEN_WIDTH 320
#define SCREEN_HEIGHT 480

extern int randomInt(int min, int max);
extern float randomFloat(float min, float max);
extern void fatalError(const char *string);