[commit] Properly cast sentinels for concat()

[Andreas Schwab]

Eli Zaretskii <eliz@gnu.org> writes:

> In this case, I'd say it's a bug in OpenBSD (it _should_ use stddef.h
> that comes with GCC when a program is compiled with GCC), coupled with
> the silly attitude of latest GCC versions to whine about more and more
> perfectly valid C code constructs.

Passing NULL as a vararg parameter is _not_ perfectly valid.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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