fixed poll timeout being larger than timer period

examples/timers/main.c

@@ -45,9 +45,9 @@ int main(void) {
   struct mg_mgr mgr;  // Event manager
   mg_mgr_init(&mgr);  // Initialise event manager
   mg_log_set("3");    // Set debug log level
-  mg_timer_add(&mgr, 300, MG_TIMER_REPEAT, timer_fn, &mgr);
+  mg_timer_add(&mgr, 1000, MG_TIMER_REPEAT, timer_fn, &mgr);
   mg_http_listen(&mgr, s_listen_on, fn, NULL);  // Create HTTP listener
-  for (;;) mg_mgr_poll(&mgr, 1000);             // Infinite event loop
+  for (;;) mg_mgr_poll(&mgr, 500);             // Infinite event loop
   mg_mgr_free(&mgr);                            // Free manager resources
   return 0;
 }