add: to_tag.s = 0;
context: unforce_rtp_proxy_f(struct sip_msg* msg, char* str1, char* str2){	str callid, from_tag, to_tag;	struct rtpp_node *node;	struct iovec v[1 + 4 + 3] = {{NULL, 0}, {"D", 1}, {" ", 1}, {NULL, 0}, {" ", 1}, {NULL, 0}, {" ", 1}, {NULL, 0}};						/* 1 */   /* 2 */   /* 3 */    /* 4 */   /* 5 */    /* 6 */   /* 1 */	if (get_callid(msg, &callid) == -1 || callid.len == 0) {		LOG(L_ERR, "ERROR: unforce_rtp_proxy: can't get Call-Id field\n");		return -1;	}	if (get_to_tag(msg, &to_tag) == -1) {		LOG(L_ERR, "ERROR: unforce_rtp_proxy: can't get To tag\n");		return -1;	}	if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {		LOG(L_ERR, "ERROR: unforce_rtp_proxy: can't get From tag\n");		return -1;	}	STR2IOVEC(callid, v[3]);	STR2IOVEC(from_tag, v[5]);	STR2IOVEC(to_tag, v[7]);	node = select_rtpp_node(callid, 1);	if (!node) {		LOG(L_ERR, "ERROR: unforce_rtp_proxy: no available proxies\n");		return -1;	}	send_rtpp_command(node, v, (to_tag.len > 0) ? 8 : 6);	return 1;}