lotlongcontrol: static constexpr

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

Author: sfuhrer

src/modules/fw_lateral_longitudinal_control/FwLateralLongitudinalControl.hpp

@@ -81,8 +81,8 @@
 #include <uORB/topics/vehicle_status.h>
 #include <uORB/topics/wind.h>
 
-const fixed_wing_lateral_setpoint_s empty_lateral_control_setpoint = {.timestamp = 0, .course = NAN, .airspeed_direction = NAN, .lateral_acceleration = NAN};
-const fixed_wing_longitudinal_setpoint_s empty_longitudinal_control_setpoint = {.timestamp = 0, .altitude = NAN, .height_rate = NAN, .equivalent_airspeed = NAN, .pitch_direct = NAN, .throttle_direct = NAN};
+static constexpr fixed_wing_lateral_setpoint_s empty_lateral_control_setpoint = {.timestamp = 0, .course = NAN, .airspeed_direction = NAN, .lateral_acceleration = NAN};
+static constexpr fixed_wing_longitudinal_setpoint_s empty_longitudinal_control_setpoint = {.timestamp = 0, .altitude = NAN, .height_rate = NAN, .equivalent_airspeed = NAN, .pitch_direct = NAN, .throttle_direct = NAN};
 
 class FwLateralLongitudinalControl final : public ModuleBase<FwLateralLongitudinalControl>, public ModuleParams,
 	public px4::WorkItem