[0.17.69] Crash when inputting a string as the zoom parameter in /screenshot

[Shadda]

When you do "/screenshot x y zoom" and all xyzoom are numbers, everything works as expected. When x or y are not valid, the command errors out and everything keep working as expected. When zoom is invalid (for example zoom = "1/8" or zoom = "test"), the game shows a popup that parsing went wrong and exits the world without saving (Probably just a missing check or sth.).

zoom should behave the same way as x and y in that it just outputs an error without crashing the game when wrong inputs are given.

[Rseding91]

Thanks for the report. It's now fixed for the next version of 0.17.