Thermal Stone doesn't take local temperature into account

local function HeatFn(inst, observer)
    local range = GetRangeForTemperature(inst.components.temperature:GetCurrent(), TheWorld.state.temperature)

The Thermal Stone doesn't take into account local temperature for it's heat generation, and still makes use of the world temperature instead.

This leads to some wackiness like:

when in prescence of a crystaleyezer in summer

Or thermal stones generating heat on their own when within a crystaleyezer and world heat has gone under -20