Fix a nameless constant: 6 -> ETHER_ADDR_LEN
Fix a nameless constant: 6 -> ETHER_ADDR_LEN

Tested with:	md5(1)

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