Re: [sr-dev] [kamailio/kamailio] nathelper: test sdp c line and sip source ip address is matched. (#2045)

@miconda I dont understand reason but it gives empty line. loggin: ``` LM_ERR("SDP CLINE2 [%*.s][LEN: %d] \n",session->ip_addr.len,&session->ip_addr.s[0],session->ip_addr.len); LM_ERR("SDP CLINE2 [%s] \n",&session->ip_addr.s[0]); ```

here is result

``` 9(4455) ERROR: {1 1 INVITE 1-4478@192.168.1.39} nathelper [nathelper.c:1370]: test_sdp_cline(): SDP CLINE2 [ ][LEN: 12] 9(4455) ERROR: {1 1 INVITE 1-4478@192.168.1.39} nathelper [nathelper.c:1371]: test_sdp_cline(): SDP CLINE2 [192.168.1.39 t=0 0 m=audio 6000 RTP/AVP 8 a=rtpmap:8 PCMA/8000 ]

```