Description:  Fix coverity issues in memberof_config.c

              13316 - double free
              13315 - Dereference after null check
              13314 - Dereference after null check
              13313 - copy/paste error

https://fedorahosted.org/389/ticket/47931

Reviewed by: rmeggins(Thanks!)

(cherry picked from commit 5daea973e4526584ee41d7b9f4b1b4993b4de6f1)
(cherry picked from commit 9a0047ef75f6dbeb1980ac77fab5d62865c77e6a)