hs_evolving_object.time_days is unusable

[Dfred]

in my lua module, defining time_days = 0.5 lead to this error:

WARNING: Object failed to generate, discarding: evolvingObject
[string "hammerstone-framework/..ject/objectManager.lua"]:924: attempt to perform arithmetic on local 'yearTime' (a nil value)

using github repo.

[DecDuck]

I think the issue is here:

if dayTime and yearTime then
    log:schema("ddapi", "   WARNING: Evolving defines both 'time_years' and 'time_days'. You can only define one.")
end

Where (for some reason) Lua is treated the AND operator as a arithmetic operator. I'm not sure how Lua handles falsy/truthy values, but casting to booleans should fix the issue. I'll see if I can draft up a PR later today.