Shorthands not recognized

[kynex7510]

Bug Report

What's the issue you encountered?

Shorthand option -a for atlas mode, -c for cubemap is not recognized; program fails with

• invalid option -- 'a'
• invalid option -- 'c'

How can the issue be reproduced?

tex3ds -a -p prev.png [image files...] tex3ds -c -p prev.png [image file]

Environment?

Arch, official build

Additional context?

v2.3.0