removed if statement that would prevent the update of the _rng_hgt_faulty flag (#480)

EKF/control.cpp

@@ -110,7 +110,6 @@ void Ekf::controlFusionModes()
 	// Get range data from buffer and check validity
 	_range_data_ready = _range_buffer.pop_first_older_than(_imu_sample_delayed.time_us, &_range_sample_delayed);
 
-	if (_range_data_ready) {
 	checkRangeDataValidity();
 
 	if (_range_data_ready && !_rng_hgt_faulty) {
@@ -119,7 +118,6 @@ void Ekf::controlFusionModes()
 		Vector3f pos_offset_earth = _R_to_earth * pos_offset_body;
 		_range_sample_delayed.rng += pos_offset_earth(2) / _R_rng_to_earth_2_2;
 	}
-	}
 	
 	// We don't fuse flow data immediately because we have to wait for the mid integration point to fall behind the fusion time horizon.
 	// This means we stop looking for new data until the old data has been fused.