Ticket #294 - 389 DS Segfaults during replica install in FreeIPA
    
    https://fedorahosted.org/389/ticket/294
    Resolves: Ticket #294
    Bug Description: 389 DS Segfaults during replica install in FreeIPA
    Reviewed by: mreynolds (Thanks!)
    Branch: 389-ds-base-1.2.10
    Fix Description: Have to check for NULL childnrdn return from
    slapi_rdn_get_prev_ext().
    Platforms tested: RHEL6 x86_64
    Flag Day: no
    Doc impact: no
    (cherry picked from commit 9e65c7a35c425d93b2459aea5d249692ffb1eed4)