ffserver: do not ignore getsockname() return

Should fix FFmpeg Coverity Scan issue #732176
Signed-off-by: Reynaldo H. Verdejo Pinochet <r.verdejo@sisa.samsung.com>

ffserver.c

@@ -1759,7 +1759,10 @@ static int http_parse_request(HTTPContext *c)
                             q += strlen(q);
 
                             len = sizeof(my_addr);
-                            getsockname(c->fd, (struct sockaddr *)&my_addr, &len);
+
+                            /* XXX: Should probably fail? */
+                            if (getsockname(c->fd, (struct sockaddr *)&my_addr, &len))
+                                http_log("getsockname() failed\n");
 
                             /* XXX: should use a dynamic buffer */
                             sdp_data_size = prepare_sdp_description(stream,