vmod_debug: Fix v1l workspace for reembarking transport demo

Clearly the v1l can not live on the worker stack.

Noticed thanks to vtest.

Ref 0cfd6cd

Author: nigoroll

vmod/vmod_debug_transports.c

@@ -80,7 +80,7 @@ dbg_deliver(struct req *req, int sendbody)
 
 	CHECK_OBJ_NOTNULL(req->wrk, WORKER_MAGIC);
 
-	v1l = V1L_Open(req->wrk->aws, &req->sp->fd, req->vsl,
+	v1l = V1L_Open(req->ws, &req->sp->fd, req->vsl,
 	    req->t_prev + SESS_TMO(req->sp, send_timeout),
 	    cache_param->http1_iovs);