ULTIMA8: Player appears to a blocker for items thrown from the ground

[OMGPizzaGuy]

Version 2.8.0 - Attempting to throw an item that is on the ground appears to consider the player a blocking item and cannot be easily thrown to the opposite side of the player. Additionally, some attempts to throw items get caught on the player's head and will only fall by moving.

[OMGPizzaGuy]

In 3efe479c:

ULTIMA8: Add owner to missle tracker.
The owner is ignored in the tracker's sweep test, which allows the player to throw an item behind them. The item still could be caught on the player as hurl does not take the owner, but testing could not easily reproduce that blocking. Fixes #14850