[slinkelist] changing discs library info

[Peter Myers]

i have one disc that cddb incorrectly id'.  i deleted it from the library,
but when i try to have cdj identify it again, it ignores that slot.  if i do
a search for discs and force it to that slot, it looks at the disc, and
reports that it is id'ing it.  however no entry appears for that slot.  it
appears that the slot is empty.  when i play the disc from cdj, it displays
the artwork for the incorrectly id'd disc.

overall it is pretty amazing as it correctly id'd all but one of the roughly
450 of 500 discs that it found a match for.