Ticket #48048 - Fix coverity issues - 2015/2/24
Coverity defect 13075 - Explicit null dereferenced (FORWARD_NULL)
Description: Added NULL check for op. If NULL, default connid and opid are
used in the accesslog.
Also, NSPRIu64 and NSPRI64 is defined based upon the architecture and compiler.
modified: acl_access_allowed & print_access_control_summary in acl.c
slapi-plugin.h