FirmwarePlugin: Add missing Q_UNUSED for arguments

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

src/FirmwarePlugin/FirmwarePlugin.cc

@@ -270,6 +270,7 @@ void FirmwarePlugin::guidedModeGotoLocation(Vehicle* vehicle, const QGeoCoordina
 void FirmwarePlugin::guidedModeChangeAltitude(Vehicle*, double, bool pauseVehicle)
 {
     // Not supported by generic vehicle
+    Q_UNUSED(pauseVehicle);
     qgcApp()->showAppMessage(guided_mode_not_supported_by_vehicle);
 }
 

src/FirmwarePlugin/FirmwarePlugin.h

@@ -331,7 +331,7 @@ public:
     static const QString px4FollowMeFlightMode;
 
     // gets hobbs meter from autopilot. This should be reimplmeented for each firmware
-    virtual QString getHobbsMeter(Vehicle* vehicle) { return "Not Supported"; }
+    virtual QString getHobbsMeter(Vehicle* vehicle) { Q_UNUSED(vehicle); return "Not Supported"; }
 
 signals:
     void toolIndicatorsChanged(void);