Fix for FreeBSD-4. - Protect whole fw_tbuf_update() with splfw().
Fix for FreeBSD-4.
- Protect whole fw_tbuf_update() with splfw().

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