Minor change to regex.c

[Ulrich Drepper]

law@redhat.com writes:

> As you are probably aware, regex.c from glibc has been imported into
> libiberty and is used by a number of projects.

There are other, much more complicated cases where ISO C is required.
In fact, the glibc version of the file cannot be used with no-ISO C
compilers without quite a lot of changes.  This means, ISO C is not
supported.  I don't know what DJ did to import the code in libiberty
but it must have included adding non-ISO C support.  So this patch
should be added to his personal set.

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