The hmac_sha256() function got renamed to hmac_sha256_internal() in
9624a1a10e, but one obscure occasion
where it was used was missed and therefore it was still used with its
old name.
Signed-off-by: Florian Schmaus <flo@geekplace.eu>
This is a workaround; eventually libwally will be a nice shared library that
we won't have to bundle, and clashing with internal symbols won't be
a problem.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
