modules/niu: fix possible sdk crash in overview page
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@ -39,7 +39,7 @@ function eth_get_available(except)
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end
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function eth_get_bridged(except)
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local devs = state:get("network", except, "device")
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local devs = state:get("network", except, "device") or ""
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local ifs = {}
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local cnt = 0
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