[SSSD] [sssd PR#140][comment] gcc7 related fixes

[fidencio]

URL: https://github.com/SSSD/sssd/pull/140
Title: #140: gcc7 related fixes

lslebodn commented:
"""
http://sssd-ci.duckdns.org/logs/job/61/53/summary.html
"""

See the full comment at https://github.com/SSSD/sssd/pull/140#issuecomment-276127472