AP_Motors: make output_test signatures consistent and ensure override

specifier on derived classes

libraries/AP_Motors/AP_MotorsCoax.h

@@ -40,7 +40,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    virtual void        output_test(uint8_t motor_seq, int16_t pwm);
+    virtual void        output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // output_to_motors - sends minimum values out to the motors
     virtual void        output_to_motors();

libraries/AP_Motors/AP_MotorsHeli.h

@@ -77,7 +77,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    virtual void output_test(uint8_t motor_seq, int16_t pwm) = 0;
+    virtual void output_test(uint8_t motor_seq, int16_t pwm) override = 0;
 
     //
     // heli specific methods

libraries/AP_Motors/AP_MotorsHeli_Dual.h

@@ -59,7 +59,7 @@ public:
     void set_update_rate( uint16_t speed_hz ) override;
 
     // output_test - spin a motor at the pwm value specified
-    void output_test(uint8_t motor_seq, int16_t pwm) override;
+    virtual void output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // set_desired_rotor_speed - sets target rotor speed as a number from 0 ~ 1000
     void set_desired_rotor_speed(float desired_speed) override;

libraries/AP_Motors/AP_MotorsHeli_Quad.h

@@ -34,7 +34,7 @@ public:
     void set_update_rate( uint16_t speed_hz ) override;
 
     // output_test - spin a motor at the pwm value specified
-    void output_test(uint8_t motor_seq, int16_t pwm) override;
+    virtual void output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // set_desired_rotor_speed - sets target rotor speed as a number from 0 ~ 1000
     void set_desired_rotor_speed(float desired_speed) override;

libraries/AP_Motors/AP_MotorsHeli_Single.h

@@ -63,7 +63,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    void output_test(uint8_t motor_seq, int16_t pwm) override;
+    virtual void output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // set_desired_rotor_speed - sets target rotor speed as a number from 0 ~ 1
     void set_desired_rotor_speed(float desired_speed) override;

libraries/AP_Motors/AP_MotorsMatrix.h

@@ -32,7 +32,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    void                output_test(uint8_t motor_seq, int16_t pwm);
+    virtual void        output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // output_to_motors - sends minimum values out to the motors
     void                output_to_motors();

libraries/AP_Motors/AP_MotorsSingle.h

@@ -40,7 +40,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    virtual void        output_test(uint8_t motor_seq, int16_t pwm);
+    virtual void        output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // output_to_motors - sends minimum values out to the motors
     virtual void        output_to_motors();

libraries/AP_Motors/AP_MotorsTailsitter.h

@@ -21,7 +21,7 @@ public:
     void set_frame_class_and_type(motor_frame_class frame_class, motor_frame_type frame_type) {}
     void set_update_rate( uint16_t speed_hz ) {}
 
-    void output_test(uint8_t motor_seq, int16_t pwm) {}
+    virtual void output_test(uint8_t motor_seq, int16_t pwm) override {}
 
     // output_to_motors - sends output to named servos
     void output_to_motors();

libraries/AP_Motors/AP_MotorsTri.h

@@ -35,7 +35,7 @@ public:
     // output_test - spin a motor at the pwm value specified
     //  motor_seq is the motor's sequence number from 1 to the number of motors on the frame
     //  pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
-    virtual void        output_test(uint8_t motor_seq, int16_t pwm);
+    virtual void        output_test(uint8_t motor_seq, int16_t pwm) override;
 
     // output_to_motors - sends minimum values out to the motors
     virtual void        output_to_motors();