cmap_work_free
cmap_work_free(r, g, b, rgb);
cmap_work_free(r, g, b, rgb);
cmap_work_free(r, g, b, 0);
cmap_work_free(*r, *g, *b, *rgb);
void cmap_work_free(u_int8_t *, u_int8_t *, u_int8_t *, u_int32_t *);