Geofence: use correct types for float params

src/modules/navigator/geofence.h

@@ -132,8 +132,8 @@ private:
 	control::BlockParamInt _param_altitude_mode;
 	control::BlockParamInt _param_source;
 	control::BlockParamInt _param_counter_threshold;
-	control::BlockParamInt _param_max_hor_distance;
-	control::BlockParamInt _param_max_ver_distance;
+	control::BlockParamFloat _param_max_hor_distance;
+	control::BlockParamFloat _param_max_ver_distance;
 
 	int _outside_counter;