Merge pull request #231 from pickledgator/ev_hgt_counter_fix

height counter update for ev primary height source

EKF/ekf.cpp

@@ -335,7 +335,7 @@ bool Ekf::initialiseFilter()
 		}
 
 	} else if (_primary_hgt_source == VDIST_SENSOR_EV) {
-		// do nothing becasue vision data is checked elsewhere
+		_hgt_counter = _ev_counter;
 	} else {
 		return false;
 	}