navigator: set position setpoint timestamp

src/modules/navigator/mission_block.cpp

@@ -590,6 +590,7 @@ MissionBlock::mission_item_to_position_setpoint(const mission_item_s &item, posi
 	}
 
 	sp->valid = true;
+	sp->timestamp = hrt_absolute_time();
 
 	return sp->valid;
 }

src/modules/navigator/navigator_main.cpp

@@ -665,9 +665,11 @@ Navigator::run()
 
 			_pos_sp_triplet.current.type = position_setpoint_s::SETPOINT_TYPE_IDLE;
 			_pos_sp_triplet.current.valid = true;
+			_pos_sp_triplet.current.timestamp = hrt_absolute_time();
+
 			_pos_sp_triplet.previous.valid = false;
-			_pos_sp_triplet.next.valid = false;
 
+			_pos_sp_triplet.next.valid = false;
 		}
 
 		/* if nothing is running, set position setpoint triplet invalid once */

src/modules/navigator/precland.cpp

@@ -93,6 +93,7 @@ PrecLand::on_activation()
 		pos_sp_triplet->current.lon = _navigator->get_global_position()->lon;
 		pos_sp_triplet->current.alt = _navigator->get_global_position()->alt;
 		pos_sp_triplet->current.valid = true;
+		pos_sp_triplet->current.timestamp = hrt_absolute_time();
 	}
 
 	_sp_pev = matrix::Vector2f(0, 0);