scb_vecref
scb_vecref(0, 0); /* Clear vector ref */
i = scb_vecref(&vec, &br);
int scb_vecref (int *, int *);
scb_vecref(0, 0); /* Clear vector ref */
i = scb_vecref(&vec, &br);
scb_vecref(0, 0); /* Clear vector ref */
i = scb_vecref(&vec, &br);