Ticket #48536 - Crash in slapi_get_object_extension
    
    Description: commit 091a5f5daf3fa378f029e293c5358ae9be9f548e introduced
    a compier warning: format '%x' expects argument of type 'unsigned int',
    but argument 4 has type 'Slapi_PBlock * {aka struct slapi_pblock *}
    
    Replacing '%x' with '%p'.
    
    (cherry picked from commit b31749f2a0bed838712719b2e6533bed0a4144e0)