title: Doctrine2 column type integer of length 255 doesn't apply to DB
body: <p>I'm using Doctrine 2 for my DB and I'm currently trying to set a length for one of my column that has an "integer" type but it just doesn't seem to be taken.</p>
  
  <pre><code>/** @Column(type="integer", length=255) */
  protected $number;
  </code></pre>
  
  <p>When I check my database it still says "int(11)" instead of "int(255)". I haven't found anyone experiencing that problem on google or maybe my keywords ain't working so good. I've seen a few example of people using length=XXX and not complaining about it so I thought it would be the way to go but so far no good...</p>
  
  <p>I'm always dropping/rebuilding the whole DB and proxies etc so I doubt it comes from there.</p>