bug#11519: "Wrong type argument: characterp" building custom-deps while boostrapping

[Stefan Monnier]

>> (should make the regex.c patch unnecessary).

> I wouldn't recommend removing the calls to
> r_alloc_inhibit_buffer_relocation around calls to regex, as that is an
> external function we don't control.  But if you feel strongly about
> that, I will remove them.

I don't feel strongly about that.  But this code is all ours, it's not
an external function (it used to be half-external, and then I hacked on
it half-extensively, after which the new version was sync'd back from
Emacs to gnulib, after which the gnulib side dropped it, and AFAIK Emacs
is the last remaining development line of this code, except maybe for
XEmacs's version).


        Stefan