res_pjsip/pjsip_distributor.c: Add missing off-nominal request response.

Change-Id: I389579b39c523d1d1e8ce020ef549a8bb5781c9b

diff --git a/res/res_pjsip/pjsip_distributor.c b/res/res_pjsip/pjsip_distributor.c
index e056b608ec5cc893a79df2ef280c87c70100dd08..8a45ddbf6a407bfb7c26f2bc512d411b448ed241 100644 (file)
--- a/res/res_pjsip/pjsip_distributor.c
+++ b/res/res_pjsip/pjsip_distributor.c
@@ -729,6 +729,7 @@ static pj_bool_t endpoint_lookup(pjsip_rx_data *rdata)
                                        AO2_ALLOC_OPT_LOCK_RWLOCK);
                                if (!unid) {
                                        ao2_unlock(unidentified_requests);
+                                       pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
                                        return PJ_TRUE;
                                }
                                strcpy(unid->src_name, rdata->pkt_info.src_name); /* Safe */