Kill a "cannot pass objects of non-POD type 'class TagLib::FileName' through '...'; call will abort at runtime" warning/error on Windows.

Work-around a playlist-core bug which prevents 'intf-change' to be set on-time after the addition of new inputs.

However, this doubles the idle-CPU load, so we may to fix that in core properly..

We should open a ticket for that one too.