[SSSD] [sssd PR#916][comment] Fix one coverity issue

[alexey-tikhonov]

URL: https://github.com/SSSD/sssd/pull/916
Title: #916: Fix one coverity issue

alexey-tikhonov commented:
"""
Hi @mzidek-rh,

I have fixed found issue and rewrote third patch to keep done section (still fixing Coverity issue).

Please, take a look.
"""

See the full comment at https://github.com/SSSD/sssd/pull/916#issuecomment-549871081