[PATCH] Fix -Wlogical-not-parentheses warning from Apple clang 13.0.0

[Ciaran Woodward]

> Patches should have some text here.

Thanks, noted - I'll do this in future.

> I approved a similar patch very recently, I don't know if it was checked
> in or not though.

Yes, I see it here (identical change, actually!) but it has not been pushed.
https://patchwork.sourceware.org/project/gdb/patch/20240205165005.3861316-1-jremus@linux.ibm.com/

May as well move ahead with that one and ignore my patch.

(what's the etiquette for pushing other people's patches?)

Cheers,
Ciaran