title: Override save_model on Django InlineModelAdmin
body: <p>I have a model that has a <code>user</code> field that needs to be auto-populated from the currently logged in user. I can get it working as specified <a href="http://www.b-list.org/weblog/2008/dec/24/admin/" rel="noreferrer">here</a> if the <code>user</code> field is in a standard ModalAdmin, but if the model I'm working with is in an <a href="http://docs.djangoproject.com/en/dev/ref/contrib/admin/#inlinemodeladmin-objects" rel="noreferrer"><code>InlineModelAdmin</code></a> and being saved from the record of another model inside the Admin, it won't take.</p>