Issue: ------------------------------------------ Asynchronous Route Blocks gets executed as a failure_route, even though there never ever was a failure.

Version: ------------------------------------------ GIT Trunk (dev), not checked earlier versions.

Example Config / how to reproduce ------------------------------------------ I've got the following main route: ``` route { [...] if (is_method("PUBLISH") && search("^(Event|o)([ \t]*):([ \t]*)reg")) { route(PUBLISH); break; }

async_sleep("1"); #Set DLG flag to track dialogs using dialog2 if (!is_method("REGISTER|SUBSCRIBE")) setflag(FLT_DIALOG); [...] } ```

With debugger module enabled, it shows as follows in syslog: ``` Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6968]: ERROR: *** cfgtrace:request_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=397 a=25 n=is_method Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6968]: ERROR: *** cfgtrace:request_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=407 a=16 n=if Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6968]: ERROR: *** cfgtrace:request_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=402 a=25 n=is_method Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6968]: ERROR: *** cfgtrace:request_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=407 a=25 n=async_sleep Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6975]: ERROR: *** cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=414 a=16 n=if Aug 17 15:41:09 ubuntu-2gb-fra1-01 [6975]: ERROR: *** cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg] l=410 a=25 n=is_method ```

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Why is route_type suddenly a failure-route? At a different part of my logic, this leads to unexpected results.

Looking at modules/tm/t_suspend.c (lines 277 ff.), I see the reason:

``` route_type_bk = get_route_type(); set_route_type(FAILURE_ROUTE); /* execute the pre/post -script callbacks based on original route block */ if (exec_pre_script_cb(&faked_req, cb_type)>0) { if (run_top_route(route, &faked_req, 0)<0) LM_ERR("failure inside run_top_route\n"); exec_post_script_cb(&faked_req, cb_type); } set_route_type(route_type_bk); ```

Any particular reason, why the route-type is explicitly set to FAILURE_ROUTE?

Thanks, Carsten