Restrengten vn_has_cached_data() by also checking the resident pages count, just like HEAD does.
Restrengten vn_has_cached_data() by also checking the resident pages
count, just like HEAD does.

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