if the phone is behind nat with us... don't consider nat processing fixees…

 if the phone is behind nat with us... don't consider nat processing fixees cases where things are EVIL like cisco 79xx

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15486 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia_reg.c

@@ -1354,6 +1354,10 @@ void sofia_reg_handle_sip_i_register(nua_t *nua, sofia_profile_t *profile, nua_h
 		nua_respond(nh, SIP_500_INTERNAL_SERVER_ERROR, TAG_END());
 		goto end;
 	}
+	
+	if (is_nat && !sofia_glue_check_nat(profile, network_ip)) {
+		is_nat = NULL;
+	}
 
 	sofia_reg_handle_register(nua, profile, nh, sip, type, key, sizeof(key), &v_event, is_nat);