space() (and flatspace()) documentation incomplete

[gloowa]

space() function documentation states:

Return: point
Position of the free space.

This omits the important case of when the function does not find the free space, in which case (unless i'm mistaken, but all test i've done do that) it returns "zero" point (point where x, y and z are all zero).

[B-CE]

confirmed, I also check for nullPoint return for "flatspace", no issue yet with "space".

[X64E]

@MrSimbax May be move this issue to https://github.com/colobot/colobot-data repo ?