Ticket 47931 - Fix coverity issues
    
    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!)