Ticket 49240 - ci compiler warns
    
    Bug Description:  Fix compiler warnings found in fedora jenkins.
    
    Fix Description:  Fix cast from calloc in pblock, fix unsigned
    constants, ifdef out some tests, change pointer type to avl
    tree.
    
    https://pagure.io/389-ds-base/issue/49240
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)