fix some random compiler warnings (#9596)

src/modules/Telemetry/AirQualityTelemetry.cpp

@@ -137,9 +137,9 @@ int32_t AirQualityTelemetryModule::runOnce()
         LOG_DEBUG("Sending sensors to sleep");
         for (TelemetrySensor *sensor : sensors) {
             if (sensor->isActive() && sensor->canSleep()) {
-                if (sensor->wakeUpTimeMs() < Default::getConfiguredOrDefaultMsScaled(moduleConfig.telemetry.air_quality_interval,
-                                                                                     default_telemetry_broadcast_interval_secs,
-                                                                                     numOnlineNodes)) {
+                if (sensor->wakeUpTimeMs() <
+                    (int32_t)Default::getConfiguredOrDefaultMsScaled(moduleConfig.telemetry.air_quality_interval,
+                                                                     default_telemetry_broadcast_interval_secs, numOnlineNodes)) {
                     LOG_DEBUG("Disabling %s until next period", sensor->sensorName);
                     sensor->sleep();
                 } else {

src/modules/Telemetry/Sensor/SEN5XSensor.cpp

@@ -572,7 +572,7 @@ bool SEN5XSensor::initDevice(TwoWire *bus, ScanI2C::FoundDevice *dev)
 
     // Check if it is time to do a cleaning
     uint32_t now;
-    int32_t passed;
+    int32_t passed = 0;
     now = getValidTime(RTCQuality::RTCQualityDevice);
 
     // If time is not RTCQualityNone, it will return non-zero