res_pjsip_outbound_registration: Don't assume that a registration client will always exist.

........

Merged revisions 404935 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@404936 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_pjsip_outbound_registration.c

@@ -307,10 +307,12 @@ static void schedule_registration(struct sip_outbound_registration_client_state
 static int handle_client_state_destruction(void *data)
 {
 	RAII_VAR(struct sip_outbound_registration_client_state *, client_state, data, ao2_cleanup);
-	pjsip_regc_info info;
 
 	cancel_registration(client_state);
 
+	if (client_state->client) {
+		pjsip_regc_info info;
+
 		pjsip_regc_get_info(client_state->client, &info);
 
 		if (info.is_busy == PJ_TRUE) {
@@ -328,6 +330,7 @@ static int handle_client_state_destruction(void *data)
 		}
 
 		pjsip_regc_destroy(client_state->client);
+	}
 
 	client_state->status = SIP_REGISTRATION_STOPPED;
 	ast_sip_auth_vector_destroy(&client_state->outbound_auths);