WordPress database error caused by meta_id None

Hello,

I came across this ticket:

https://www.ads-software.com/support/topic/wordpress-database-error-unknown-column-none-in-where-clause/

This fix works, except it is not internationalized. On my Dutch site I still get the DB-warning “WordPress databasefout: `[Unknown column ‘Geen’ in ‘where clause’]
SELECT * FROM wp_nm_personalized WHERE productmeta_id = Geen”`.

Could you please update the snippet in ppom.class.php#161 from

if( !$meta_id || $meta_id == "None" ) return null;

to

if( !$meta_id || $meta_id == __("None") ) return null;

Tnx!

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