repair PHP Notice, on line 17

when run <php queue.php PHP_Job>, it has a PHP Notice.
I think it's right command <php queue.php default PHP_Job>.

Author: jingyu liu

demo/queue.php

@@ -13,6 +13,10 @@
 		'test' => 'test',
 	),
 );
+if (empty($argv[2])) {
+	$jobId = Resque::enqueue('default', $argv[1], $args, true);
+} else {
+        $jobId = Resque::enqueue($argv[1], $argv[2], $args, true);	
+}
 
-$jobId = Resque::enqueue($argv[1], $argv[2], $args, true);
-echo "Queued job ".$jobId."\n\n";
+echo "Queued job ".$jobId."\n\n";