mc_pos_control: use local position timestamp for dt

src/modules/mc_pos_control/Takeoff/Takeoff.hpp

@@ -59,7 +59,7 @@ public:
 	~Takeoff() = default;
 
 	// initialize parameters
-	void setSpoolupTime(const float seconds) { _spoolup_time_hysteresis.set_hysteresis_time_from(false, (hrt_abstime)(seconds * (float)1_s)); }
+	void setSpoolupTime(const float seconds) { _spoolup_time_hysteresis.set_hysteresis_time_from(false, seconds * 1_s); }
 	void setTakeoffRampTime(const float seconds) { _takeoff_ramp_time = seconds; }
 
 	/**