8374444: Fix simple -Wzero-as-null-pointer-constant warnings

[kimbarrett]

Please review this trivial change to fix several recent changes that trigger
-Wzero-as-null-pointer-constant warnings when that warning is enabled.

Testing: mach5 tier1

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
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• Commit message must refer to an issue

Issue

• JDK-8374444: Fix simple -Wzero-as-null-pointer-constant warnings (Enhancement - P4)

Reviewers

• Axel Boldt-Christmas (@xmas92 - Reviewer)

Reviewing

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Update a local copy of the PR:
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$ git pull https://git.openjdk.org/jdk.git pull/29014/head

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$ git pr checkout 29014

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Using Webrev

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[bridgekeeper]

👋 Welcome back kbarrett! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@kimbarrett This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8374444: Fix simple -Wzero-as-null-pointer-constant warnings

Reviewed-by: aboldtch

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[openjdk]

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[mlbridge]

Webrevs

• 01: Full - Incremental (fe41f6ef)
• 00: Full (5e9e059f)

[xmas92]

lgtm. Trivial.

[kimbarrett]

Thanks for review @xmas92

[kimbarrett]

/integrate

[openjdk]

Going to push as commit efb79dc.
Since your change was applied there have been 3 commits pushed to the master branch:

• 05d2f7f: 8373847: Test javax/swing/JMenuItem/MenuItemTest/bug6197830.java failed because The test case automatically fails when clicking any items in the “Nothing” menu in all four windows (Left-to-right)-Menu Item Test and (Right-to-left)-Menu Item Test
• 2ea3c00: 4337898: Serializing DefaultTableCellRenderer changes colors
• 65af6bc: 8374371: Failed assertion in G1HeapRegion gtest

Your commit was automatically rebased without conflicts.

[openjdk]

@kimbarrett Pushed as commit efb79dc.

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