Don't bind bogus Location or Facing lua properties for actors without Location or Facing

[pchote]

Fixes an issue brought up on Discord where HasProperty returns true but the script crashes when they are used on e.g. the player actor.

Testcase: add the following to the bottom of the RA shellmap's WorldLoaded function:

Utils.Do(Allies.GetActors(), function(f) if f.HasProperty("Location") then print(f.Location.X) end end)

Note: Similar changes really should be done for the other methods/properties in GeneralProperties, but those would be breaking API changes, so I don't want to deal with them here.

[PunkPun]

LGTM

[PunkPun]

chnagelog

0baddf4...0651308