Fix a problem that pages in a mapped region were not always properly invalidated.  Now we traverse the object shadow chain properly.
Fix a problem that pages in a mapped region were not always
properly invalidated.  Now we traverse the object shadow chain
properly.

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