Fix compile errors

Author: knro

drivers/power/cheapodc.cpp

@@ -758,6 +758,7 @@ bool CheapoDC::SetPowerPort(size_t port, bool enabled)
 
 bool CheapoDC::SetDewPort(size_t port, bool enabled, double dutyCycle)
 {
+    INDI_UNUSED(enabled);
     if (port == 0) // Main dew output
     {
         return setOutput(static_cast<int>(dutyCycle));
@@ -1518,7 +1519,7 @@ bool CheapoDC::readSettings()
 
     if (ok == 1)
     {
-        DewChannelsSP[0].setValue(output);
+        DewChannelsSP[0].setState(output > 0 ? ISS_ON : ISS_OFF);
         DewChannelsSP.setState(IPS_OK);
         DewChannelsSP.apply();
     }

drivers/power/usb_dewpoint.cpp

@@ -549,9 +549,9 @@ bool USBDewpoint::readSettings()
         DewpointNP.setState(IPS_OK);
         DewpointNP.apply();
 
-        DewChannelsSP[0].setValue(output1);
-        DewChannelsSP[1].setValue(output2);
-        DewChannelsSP[2].setValue(output3);
+        DewChannelsSP[0].setState(output1 > 0 ? ISS_ON : ISS_OFF);
+        DewChannelsSP[1].setState(output2 > 0 ? ISS_ON : ISS_OFF);
+        DewChannelsSP[2].setState(output3 > 0 ? ISS_ON : ISS_OFF);
         DewChannelsSP.setState(IPS_OK);
         DewChannelsSP.apply();