sensor: cast variable as UNUSED and prevent intended assignment warnings

code/espurna/sensor.ino

@@ -238,6 +238,7 @@ void _sensorWebSocketOnConnected(JsonObject& root) {
     for (unsigned char i=0; i<_sensors.size(); i++) {
 
         BaseSensor * sensor = _sensors[i];
+        UNUSED(sensor);
 
         #if EMON_ANALOG_SUPPORT
             if (sensor->getID() == SENSOR_EMON_ANALOG_ID) {
@@ -1378,17 +1379,17 @@ void _sensorConfigure() {
                 double value;
                 HLW8012Sensor * sensor = (HLW8012Sensor *) _sensors[i];
 
-                if (value = getSetting("pwrExpectedC", 0).toFloat()) {
+                if ((value = getSetting("pwrExpectedC", 0).toFloat())) {
                     sensor->expectedCurrent(value);
                     setSetting("pwrRatioC", sensor->getCurrentRatio());
                 }
 
-                if (value = getSetting("pwrExpectedV", 0).toInt()) {
+                if ((value = getSetting("pwrExpectedV", 0).toInt())) {
                     sensor->expectedVoltage(value);
                     setSetting("pwrRatioV", sensor->getVoltageRatio());
                 }
 
-                if (value = getSetting("pwrExpectedP", 0).toInt()) {
+                if ((value = getSetting("pwrExpectedP", 0).toInt())) {
                     sensor->expectedPower(value);
                     setSetting("pwrRatioP", sensor->getPowerRatio());
                 }