Pass the right buffer size to _nss_nonlocal_getgrnam_r in get_local_group.
Pass the right buffer size to _nss_nonlocal_getgrnam_r in get_local_group.

Signed-off-by: Anders Kaseorg <087231934ba8fcf78bc142ce37d193b895ac03c4@mit.edu>

andersk/nss_nonlocal,andersk/nss_nonlocal