if (sn->data[0] & 0x80) { leadingZero = PR_TRUE; key->len++; }
nsslowcert_KeyFromIssuerAndSN(PRArenaPool *arena, SECItem *issuer, SECItem *sn,			SECItem *key){    PRBool leadingZero = PR_FALSE;    int start;    key->len = sn->len + issuer->len;    if (sn->data[0] & 0x80) {	leadingZero = PR_TRUE;	key->len++;    }        key->data = (unsigned char*)PORT_ArenaAlloc(arena, key->len);    if ( !key->data ) {	goto loser;    }    if (leadingZero) {	key->data[0] = 0;	start = 1;    } else {	start = 0;    }    /* copy the serialNumber */    PORT_Memcpy(key->data + start, sn->data, sn->len);    /* copy the issuer */    PORT_Memcpy(&key->data[start + sn->len], issuer->data, issuer->len);    return(SECSuccess);loser:    return(SECFailure);}