[SSSD] [sssd PR#91][comment] sssctl: Fix missing declaration

[fidencio]

URL: https://github.com/SSSD/sssd/pull/91
Title: #91: sssctl: Fix missing declaration

fidencio commented:
"""
Please, mention that the breakage was noticed when building SSSD on FreeBSD on this patch as well.
"""

See the full comment at https://github.com/SSSD/sssd/pull/91#issuecomment-262854618