Added error messages to sending setpoints from gui

groundStation/gui/MicroCART/crazyflieworker.cpp

@@ -107,7 +107,9 @@ void CrazyflieWorker::sendAttRateSetpoint()
         data.yaw = currAttitudeRateSetpoint.yaw;
 
         //send setpoint
-        frontend_setoutputoverride(conn, &data);
+        if(frontend_setoutputoverride(conn, &data) != 0){
+            qInfo() << "error sending att rate setpoint";
+        }
     }
 }
 
@@ -127,7 +129,9 @@ void CrazyflieWorker::sendAttSetpoint()
         data.yaw = currAttitudeSetpoint.yaw;
 
         //send setpoint
-        frontend_setoutputoverride(conn, &data);
+        if(frontend_setoutputoverride(conn, &data) != 0){
+            qInfo() << "error sending att setpoint";
+        }
     }
 }
 
@@ -148,7 +152,9 @@ void CrazyflieWorker::sendMixedAttSetpoint(){
 
 
         //send setpoint
-        frontend_setoutputoverride(conn, &data);
+        if(frontend_setoutputoverride(conn, &data) != 0){
+            qInfo() << "error sending mixed att setpoint";
+        }
     }
 }