libc: fix build after r356830
authormjg <mjg@FreeBSD.org>
Fri, 17 Jan 2020 15:45:39 +0000 (15:45 +0000)
committermjg <mjg@FreeBSD.org>
Fri, 17 Jan 2020 15:45:39 +0000 (15:45 +0000)
commit9cf8f9944707922dd7334b5c5d175445d24e94fd
tree0d2de6ccaae6665b7ada32e5bfe553896a850e3e
parentb9e575596ea0b3f01ffc5f3ef1e32470e1c48a91
libc: fix build after r356830

Apparently building with 'cd lib/libc; make all install' is not the same
as buildworld.

Reported by: Michael Butler
lib/libc/gen/opendir.c