LuaEntity::display_panel_icon reading/writing nil

[Quezler]

If a display panel has no icon then reading it returns nil, according the the docs it cannot be nil.

You cannot clear the icon of a display panel either.

/c game.print(serpent.line(game.player.selected.display_panel_icon)) -- nil
/c game.player.selected.display_panel_icon = nil -- fails
/c game.player.selected.display_panel_icon = {} -- fails

Expected behavior: reading nil becomes documented, and writing nil to clear the icon becomes supported.

[boskid]

Thanks for the report. Issue is now fixed for 2.0.65.