If the inventory is full, and I click an item on the ground while having
inventory opened, tux walks towards it and the item is "picked up" and displayed
next to the cursor letting me replace some other item in the inv with it.
While the item is near the cursor, tux is still shown in the very frame he had
when the item was picked up.
As soon as I drop the item, tux animation is reset to a standing frame.
This reset should happen as soon as tux doesn't move anymore and the item is
displayed near the cursor.
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