Bug 675113 - ns-slapd core dump in windows_tot_run if oneway sync is used
    
    https://bugzilla.redhat.com/show_bug.cgi?id=675113
    Resolves: bug 675113
    Bug Description: ns-slapd core dump in windows_tot_run if oneway sync is used
    Author: Carsten Grzemba <grzemba@contac-dt.de>
    Reviewed by: rmeggins
    Branch: 389-ds-base-1.2.8
    Fix Description: Init pb and dn to NULL to avoid free of uninit memory.
    Platforms tested: RHEL6 x86_64
    Flag Day: no
    Doc impact: no
    (cherry picked from commit cee5f058e10b6379d12b643e03eed81ee22a937d)