RFR: JDK-8323543: NPE when table items are set to null [v2]

[Carl Döbbelin]

On Wed, 10 Jan 2024 19:09:47 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: clean up code

i will look into whether it is possible to generate a nullpointer with the current code, and add a test to check that they are not thrown anymore.

-------------

PR Comment: https://git.openjdk.org/jfx/pull/1329#issuecomment-1885532560