Prevent NPE when passing stage without scene to Dialog.initOwner

[Eng-Fouad]

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Progress

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Error

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Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jfx.git pull/1606/head:pull/1606
$ git checkout pull/1606

Update a local copy of the PR:
$ git checkout pull/1606
$ git pull https://git.openjdk.org/jfx.git pull/1606/head

Using Skara CLI tools

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$ git pr checkout 1606

View PR using the GUI difftool:
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Download this PR as a diff file:
https://git.openjdk.org/jfx/pull/1606.diff

[bridgekeeper]

Hi @Eng-Fouad, welcome to this OpenJDK project and thanks for contributing!

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[Eng-Fouad]

/signed

[bridgekeeper]

Thank you! Please allow for up to two weeks to process your OCA, although it is usually done within one to two business days. Also, please note that pull requests that are pending an OCA check will not usually be evaluated, so your patience is appreciated!

[bridgekeeper]

@Eng-Fouad This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply add a new comment to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!