[NETBEANS-7949] Fixing handling of 'case null'. #11597

Job	Run time
NetBeans on nb-javac	0s
Build Clusters on JDK 17	9m 40s
Build Clusters on JDK 21	8m 29s
Build Clusters on JDK 24-ea	7m 43s
CV on ubuntu-latest/JDK 17	9m 38s
CV on macos-latest/JDK 17	17m 52s
Check Paperwork on Linux/JDK 17	14m 3s
Build-System / Misc Tests on Linux/JDK 17	14m 58s
IDE Modules on Linux/JDK 17	20m 1s
CV on windows-latest/JDK 17	11m 53s
CV on ubuntu-latest/JDK 23	8m 46s
Build platform from src.zip on JDK 17	2m 16s
Build-Tools on Linux/JDK ${{ matrix.java }}	0s
Build release from src.zip on JDK 17	13m 32s
Java Modules on Linux/JDK 17	39m 24s
Platform Modules batch2 on Linux/JDK ${{ matrix.java }}	0s
Platform Modules batch1 on Linux/JDK ${{ matrix.java }} (some on 8)	0s
Profiler on Linux/JDK 17	1m 26s
Java Hints batch1 on Linux/JDK 17	18m 54s
Java Debugger tests on Linux/JDK 17	5m 54s
Java Hints batch2 on Linux/JDK 17	13m 29s
Java Debugger tests on Linux/JDK 21	13m 21s
Java Hints batch1 on Linux/JDK 23	19m 34s
Web Modules on Linux/JDK ${{ matrix.java }}	0s
Java Debugger tests on Linux/JDK 24-ea	15m 56s
Java Hints batch2 on Linux/JDK 23	14m 3s
Groovy on Linux/JDK ${{ matrix.java }}	0s
JavaFX on Linux/JDK ${{ matrix.java }}	0s
Rust on Linux/JDK ${{ matrix.java }}	0s
Enterprise on Linux/JDK ${{ matrix.java }}	0s
DB Tests with MySQL on Linux/JDK ${{ matrix.java }}	0s
PHP on ${{ matrix.os }}/JDK ${{ matrix.java }}	0s
Versioning Modules on Linux/JDK ${{ matrix.java }}	0s
GraalVM ${{ matrix.graal }} Tests	0s
LSP tests on Linux/JDK 17	7m 57s
VSCode Extension Tests on JDK 17	4m 58s
Cleanup Workflow Artifacts	2s
	4h 53m 49s

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