cff2 subset fuzzer issues (#1619)
* add check to FDArray::serialize * add test files * fix off by one
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@ -525,6 +525,7 @@ struct FDArray : CFFIndexOf<COUNT, FontDict>
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for (unsigned i = 0; i < fontDicts.length; i++)
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if (fdmap.includes (i))
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{
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if (unlikely (fid >= fdCount)) return_trace (false);
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CFFIndexOf<COUNT, FontDict>::set_offset_at (fid++, offset);
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offset += FontDict::calculate_serialized_size (fontDicts[i], opszr);
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}
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