Fix a couple of bogus casts to off_t that caused dumpfs to lseek negative on filesystems > 2GB (which causes the disk slice code to call Debugger!!)
Fix a couple of bogus casts to off_t that caused dumpfs to lseek negative
on filesystems > 2GB (which causes the disk slice code to call Debugger!!)

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