Better deal with infinite recursion in GlyphDataTable.ReadCompositeGlyph and fix #1347 - #1348

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Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'fieldDictionary' in 'AcroFieldBase AcroFormFactory.GetAcroField(DictionaryToken fieldDictionary, Catalog catalog, IReadOnlyList<DictionaryToken> parentDictionaries)'.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'dictionaryToken' in 'int DictionaryTokenExtensions.GetInt(DictionaryToken dictionaryToken, NameToken name)'.