[PDFBOX-786] PDChoiceField's implementation of SetValue does not work for all PDF forms. Sometimes it throws ClassCastException - ASF JIRA

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For a choice with the following options:

COSArray{[COSString{ }, COSArray{[COSString

{NR}

, COSString

{Non-reactive}

]}, COSArray{[COSString

{R}

, COSString

{Reactive}

]}, COSArray{[COSString

{Declined}, COSString{Declined}

]}]}

A class cast is thrown as the code expects all items to be strings as the first item is a string. However, the remaining items are all pairs.

The attached code is the fix. It just makes the pair/single check every time through the loop.