title: WP_MAX_MEMORY_LIMIT in wp-config.php seems to be ignored
body: <p>I am using <strong>WordPress v.3.8.1</strong> with WMPL (WordPress Multilingual Plugin) v.3.1.4 and WPML Media Pugin v.2.1.3.</p>
  
  <p>In php.ini file I have...  </p>
  
  <pre><code>memory_limit = 512M
  </code></pre>
  
  <p>I already have a info.php file with <code>&lt;?php phpinfo(); ?&gt;</code> where I can see that <code>memory_limit = 512M</code>.</p>
  
  <p>In wp-config.php file I have before wp-settings.php inclusion...  </p>
  
  <pre><code>define( 'WP_MAX_MEMORY_LIMIT', '384M' );
  </code></pre>
  
  <p>When I am trying to use "Media Translation" I get this error after 50/400 media have been processed...  </p>
  
  <pre><code>Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 523800 bytes) in /wp-includes/plugin.php on line 1939
  </code></pre>
  
  <p>I am sorry for the duplicate <a href="https://wordpress.stackexchange.com/q/137698/45047">https://wordpress.stackexchange.com/q/137698/45047</a> but I really need some guidelines.</p>
  
  <p>Thank you!</p>