Thrifty Doesn't Work

[DeadEyeTucker]

Here's the code for the thrifty trait in the current beta branch.

trait_thrifty = {
    cost = 2
    allowed_archetypes = { BIOLOGICAL }
    opposites = { "trait_hive_mind" }
    custom_tooltip = TRAIT_THRIFTY_EFFECT   
}

No actual modifier for the pops.