Fix save state crash

[griffi-gh]

closes... uhh this

fix saving state with lua script by adding bit32 to the ignore table

[rollerozxa]

From #development:

I'm testing #163 and I get this error when trying to open an old savefile now, while new savefiles work:

PANIC: unprotected error in call to Lua API (bad permanent value (no value))

(the old savefile worked to load in master)

[griffi-gh]

i have no idea why that breaks it but ok...