Fix "overflow error: int too big to convert error"

[twise2]

Tech tree errors when trying to write an int 8

[twise2]

vs

[HSZemi]

Uhhhh… Well the error message is correct. You simply can't have more than 255 unit connections in the tech tree section of the dat file. That field may be a int16_t for Star Wars: Galactic Battleground, but it's a uint8_t otherwise:
https://github.com/Tapsa/genieutils/blob/4b454e5b9f26a240078bb6a5c2bd3f514b3dc94b/src/dat/TechTree.cpp#L73

I think the tech tree section of the dat file is not used by AoE2 DE anyway? Not sure. In any case, your "fix" sadly only breaks the file format 🥲

[twise2]

hmm, you appear to be correct as usual.

If that's the case it may be worth pulling the file entirely. It's throwing me off a bit still because the length before I am appending appears to be length appears to be 290 before the overflow is caused.