Remove a check for the return value added in rev 1.41.  It's not an error to fail to turn off a fan, since the case is that it's usually already off.
Remove a check for the return value added in rev 1.41.  It's not an error
to fail to turn off a fan, since the case is that it's usually already off.

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