[Issue 22035] [REG 2.097][ICE] Segmentation fault parsing invalid case statement

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22035

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject.org> ---
It's a regression https://github.com/dlang/dmd/pull/12292

Just so happens that this change was copied ad-verbatim into cparse as well.

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