ipa: fix empty IPA CCM ID Tags
decode_ies() would crash because lists:lasts([]) tries to access an empty lists.
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@ -82,9 +82,12 @@ decode_ies(<<1:8, IdTag:8, Remain/binary>>, IeList) when is_list(IeList) ->
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decode_ies(<<0:8, Len:8, TypeValue:Len/binary, Remain/binary>>, IeList) when is_list(IeList) ->
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<<Type:8, Value/binary>> = TypeValue,
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ValueList = binary_to_list(Value),
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case lists:last(ValueList) of
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0 -> ValueStripped = lists:droplast(ValueList);
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_ -> ValueStripped = ValueList
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case ValueList of
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[] -> ValueStripped = [];
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_ -> case lists:last(ValueList) of
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0 -> ValueStripped = lists:droplast(ValueList);
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_ -> ValueStripped = ValueList
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end
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end,
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decode_ies(Remain, IeList ++ [{string, decode_idtag(Type), ValueStripped}]).
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