FS-9183: [mod_sofia] Handle 415 Unsupported Media Type as 488

Handle 415 Unsupported Media Type the same as 488 Not Acceptable Here
after t.38 ReINVITE. This resolves an issue where the call would fail and
translates the response code to the more standard 488 Not Acceptable Here
allowing the call to continue in audio mode.

FS-9183 #resolve

src/mod/endpoints/mod_sofia/sofia.c

@@ -6526,6 +6526,12 @@ static void sofia_handle_sip_r_invite(switch_core_session_t *session, int status
 						switch_core_media_proxy_remote_addr(session, NULL);
 					}
 
+					if (status == 415) {
+						int new_status = 488;
+						switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Overriding %d %s with %d\n", status, phrase, new_status);
+						status = new_status;
+					}
+
 					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Passing %d %s to other leg\n%s\n", status, phrase, switch_str_nil(r_sdp));
 					
 					if (switch_core_session_compare(session, other_session)) {