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

coil

2019-12-30 da95be53ec5703e808233d7b45fc42fb500863dd

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default
pipeworks
technic_worldgen
basic_materials
bucket?
screwdriver?
mesecons?
mesecons_mvps?
digilines?
digiline_remote?
intllib?
unified_inventory?
vector_extras?
dye?