Draft: This fixes weird "I remember you Unknown Item person" message in trick-or-treat...

...after player performed trick-or-treat and came to same NPC again.

Root cause:

• On one side, getitemlink() does not works with integers, only item names (strings).
• On other, getequipid(equip_head) returns integer number, itemID.

Overall it downspirals into attempt to look up nonexistent item, hence "Unknown Item".

This error has been reported by player to me.

Reported-By: Alexdyne