Spawnflags not properly added to .def

Steps for reproduction:
- Compile current .csv into .def and .ent

Expected result: Spawnflags appear in the relevant sections.
Actual result: Spawnflags DON'T appear in the relevant sections.

Keeping open for ideas on how to solve this issue. pull-requests are also welcome (and since this is my repo, you don't need to worry about PR delay).