Remove always false "< 0" check for unsgined int variable. This check is also duplicate, as the value was already checked for 0 before decrementing.
Remove always false "< 0" check for unsgined int variable. This check is
also duplicate, as the value was already checked for 0 before decrementing.

Reported by:	rpaulo

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