Bug 750625 - Fix Coverity (11116) Uninitialized pointer read
    
    https://bugzilla.redhat.com/show_bug.cgi?id=750625
    
    slapd/back-ldbm/ldbm_entryrdn.c (entryrdn_lookup_dn)
    
    Bug Description: Using uninitialized "data.data" when calling
    "slapi_ch_free".  If invalid NULL arguments or invalid DN is
    passed or opening cursor failed, uninitialized data.data is freed.
    
    Fix Description: initialize data if there is a chance to call
    slapi_ch_free.