Correct SEEPROM checksum calculation when multiple checksum attemps are made.
Correct SEEPROM checksum calculation when multiple checksum attemps are made.

Pointed out by:	"Jose M. Alcaide" <jose@we.lc.ehu.es>

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