Fix radiation protection when armor group is not set (#509)

coil

2019-12-30 da95be53ec5703e808233d7b45fc42fb500863dd

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local S = technic.getter
 
function technic.register_compressor(data)
    data.typename = "compressing"
    data.machine_name = "compressor"
    data.machine_desc = S("%s Compressor")
    technic.register_base_machine(data)
end