Error while running event windturbines::on_nth_tick(61)
windturbines/control.lua:145: attempt to index field '?' (a nil value)
stack traceback:
windturbines/control.lua:145: in function 'destroy_turbine'
windturbines/control.lua:97: in function <windturbines/control.lua:84>
this came after i got tier 2 windturbines
