removing a deprecation notice

Hey Dan,

Just testing this out on the intentionally homeless site. Will be uploading many photos via ftp when ever near a net connection.

Just noticed this during the enabling of the module;
Warning: Call-time pass-by-reference has been deprecated in /path/to/drupal/sites/intentionallyhomeless.org/modules/meta___metadata_management_for_media_files/meta_inspector.module on line 218

Nothing fatal, but it's a tidy up.

Will also let give the Advanced Help docs a run through.

Au