rem: TFB_DrawCanvas_SetTransparentIndex (TFB_Canvas canvas, int index)
add: TFB_DrawCanvas_SetTransparentIndex (TFB_Canvas canvas, int index, BOOLEAN rleaccel)
context: TFB_DrawCanvas_SetTransparentIndex (TFB_Canvas canvas, int index){	if (index >= 0)	{		SDL_SetColorKey ((SDL_Surface *)canvas, SDL_SRCCOLORKEY, index); 	}	else	{		SDL_SetColorKey ((SDL_Surface *)canvas, 0, 0); 	}		}