[bug #68339] compiler warnings from clang-21 during build

Follow-up Comment #6, bug #68339 (group groff):

  Compiled "groff-1.24.1.tar.gz" from "https://ftpmirror.gnu.org/" with
clang-21.

  Output from "make" as usual is in the attachment.


(file #58621)

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Additional Item Attachment:

Name: make.groff-1.24.1.out.gz       Size: 36KiB

<https://file.savannah.gnu.org/file/make.groff-1.24.1.out.gz?file_id=58621>


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