Fix missing "$sz" variable in example/userstream-simple.php. I assume…

… this was suppose to be the size of the object returned in the stream.

example/userstream-simple.php

@@ -35,7 +35,7 @@ public function enqueueStatus($status)
      *  should be being enqueued and processed asyncronously from the collection process. 
      */
     $data = json_decode($status, true);
-    echo date("Y-m-d H:i:s (").$sz."):".print_r($data,true)."\n";
+    echo date("Y-m-d H:i:s (").strlen($status)."):".print_r($data,true)."\n";
   }
 
 }