title: Phalcon Micro - route with blank parameter
body: <p>I have a nginx + phalcon3.3 + php7 server and a script with phalconMicro, in the next route I'm setting:</p>
  
  <pre><code>$app-&gt;get(
      "/{animal}",
      function ($animal) {
          $REQUEST_URI = $_SERVER[REQUEST_URI];
  
          echo "$REQUEST_URI&lt;br/&gt;";
          echo "animal: $animal";
          if($animal === ''){
              echo '&lt;br/&gt;No animal, :(';
          }
      }
  );
  </code></pre>
  
  <p>Requesting <a href="http://localhost:81/cat/dog/bird" rel="nofollow noreferrer">http://localhost:81/cat/dog/bird</a> I get:</p>
  
  <pre><code>animals/cat/dog/bird
  animal:
  No animal, :(
  </code></pre>
  
  <p>I'm trying to get:</p>
  
  <pre><code>animals/cat/dog/bird
  animal: cat
  </code></pre>
  
  <p>What is my mistake I already eat the phalcon micro tutorial, the phalcon micro api doc and also the nginx + phalcon docs.</p>
  
  <p>btw there is my nginx rule:</p>
  
  <pre><code>location ~ /animals {
      include fastcgi_params;
      fastcgi_param SCRIPT_FILENAME thePhalconMicroScript.php;
      fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
  }
  </code></pre>