Ticket 48801 - ASAN errors during tests
    
    Bug Description:  ERROR: AddressSanitizer: stack-buffer-overflow was detected
    during the stress tests of DS
    
    Fix Description:  passthru auth was using an int rather than a ber_tag_t for
    the pointer into slapi_pblock_get causing a buffer overflow.
    
    https://fedorahosted.org/389/ticket/48801
    
    Author: wibrown
    
    Review by: nhosoi