RFR: JDK-8323543: NPE when table items are set to null [v3]

[Andy Goryachev]

On Thu, 11 Jan 2024 16:48:53 GMT, Carl Döbbelin <duke at openjdk.org> wrote:

>> This PR fixes a nullpointer in TableSkinUtils that occured when the Tables items were null.
>
> Carl Döbbelin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   JDK-8323543: add test and fix for another npe

I might suggest to add a null check to TableCellBehaviour:70 regardless, just to be on the safe side.
We can skip the unit test because there is no way to interact with a cell in this particular case.
What do you think?

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PR Comment: https://git.openjdk.org/jfx/pull/1329#issuecomment-1887572456