fix: Do not create rrd folder when -r is specified for poller (#4812)

includes/polling/functions.inc.php

@@ -184,7 +184,7 @@ function poll_device($device, $options)
     $update_array = array();
 
     $host_rrd = $config['rrd_dir'].'/'.$device['hostname'];
-    if (!is_dir($host_rrd)) {
+    if ($config['norrd'] !== true && !is_dir($host_rrd)) {
         mkdir($host_rrd);
         echo "Created directory : $host_rrd\n";
     }