Check networks before expiring routes.

babel.c

@@ -506,9 +506,9 @@ main(int argc, char **argv)
         }
 
         if(now.tv_sec >= expiry_time) {
+            check_networks();
             expire_routes();
             expire_requests();
-            check_networks();
             expiry_time = now.tv_sec + 20 + random() % 20;
         }