Ensuring that tables storing player data are initialized before being used.
Reviewed-on: MineClone2/MineClone2#4246
Reviewed-by: the-real-herowl <the-real-herowl@noreply.git.minetest.land>
Co-authored-by: teknomunk <teknomunk@protonmail.com>
Co-committed-by: teknomunk <teknomunk@protonmail.com>