Fix INVARIANTS build on amd64; (unsigned unsigned long) != u_int64_t.
Fix INVARIANTS build on amd64; (unsigned unsigned long) != u_int64_t.

Submitted by:	mlaier

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase