load_index = SPR_AUTORAIL_BASE;

	load_index += LoadGrfFile("autorail.grf", load_index, i++);

	assert(load_index == SPR_OPENTTD_BASE);

	LoadGrfIndexed("openttd.grf", _openttd_grf_indexes, i++);

	load_index = SPR_OPENTTD_BASE + OPENTTD_SPRITES_COUNT + 1;