Merge pull request #297 from ursa-drone/vispos_fix

Fixed vision position fusion bug

EKF/control.cpp

@@ -150,6 +150,7 @@ void Ekf::controlExternalVisionFusion()
 				resetPosition();
 				resetVelocity();
 				resetHeight();
+				_control_status.flags.ev_pos=true;
 			}
 		}