Set default duration parameter of joystick vibration to 0.

core/os/input.cpp

@@ -61,7 +61,7 @@ void Input::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("get_joy_guid","device"),&Input::get_joy_guid);
 	ObjectTypeDB::bind_method(_MD("get_joy_vibration_strength", "device"), &Input::get_joy_vibration_strength);
 	ObjectTypeDB::bind_method(_MD("get_joy_vibration_duration", "device"), &Input::get_joy_vibration_duration);
-	ObjectTypeDB::bind_method(_MD("start_joy_vibration", "device", "weak_magnitude", "strong_magnitude", "duration"), &Input::start_joy_vibration);
+	ObjectTypeDB::bind_method(_MD("start_joy_vibration", "device", "weak_magnitude", "strong_magnitude", "duration"), &Input::start_joy_vibration, DEFVAL(0));
 	ObjectTypeDB::bind_method(_MD("stop_joy_vibration", "device"), &Input::stop_joy_vibration);
 	ObjectTypeDB::bind_method(_MD("get_accelerometer"),&Input::get_accelerometer);
 	ObjectTypeDB::bind_method(_MD("get_magnetometer"),&Input::get_magnetometer);

core/os/input.h

@@ -70,7 +70,7 @@ public:
 	virtual Vector2 get_joy_vibration_strength(int p_device)=0;
 	virtual float get_joy_vibration_duration(int p_device)=0;
 	virtual uint64_t get_joy_vibration_timestamp(int p_device)=0;
-	virtual void start_joy_vibration(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration)=0;
+	virtual void start_joy_vibration(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration=0)=0;
 	virtual void stop_joy_vibration(int p_device)=0;
 
 	virtual Point2 get_mouse_pos() const=0;

main/input_default.h

@@ -189,7 +189,7 @@ public:
 	void set_magnetometer(const Vector3& p_magnetometer);
 	void set_joy_axis(int p_device,int p_axis,float p_value);
 
-	virtual void start_joy_vibration(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration);
+	virtual void start_joy_vibration(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration=0);
 	virtual void stop_joy_vibration(int p_device);
 
 	void set_main_loop(MainLoop *main_loop);