Dropship part fabricator cant create modules

[chaos-creations]

Testmerges

none

Round ID

No response

Description of the bug

[21:29:47]RUNTIME: Cannot create objects of type null. - code/modules/cm_marines/vehicle_part_fabricator.dm@73
When you choose to create a module, they do not appear at the end of the process. When creating ammunition, everything works fine.

https://files.catbox.moe/y10nsb.mp4

What's the difference with what should have happened?

Well, uh, should it create modules too?

How do we reproduce this bug?

1. Create part fabricator
2. Start creating a module
3. See that it was not created.
   ...

Issue Bingo

• Issue could be reproduced at least once
• Issue happened in a recent (less than 7 days ago) round
• Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)