AC_AutoTune: fixed missing else statement

libraries/AC_AutoTune/AC_AutoTune.cpp

@@ -1276,10 +1276,11 @@ void AC_AutoTune::twitching_abort_rate(float angle, float rate, float angle_max,
             step_scaler *= 0.9f;
             // ignore result and start test again
             step = WAITING_FOR_LEVEL;
-        }
+        } else {
             step = UPDATE_GAINS;
         }
     }
+}
 
 // twitching_test_angle - twitching tests
 // update min and max and test for end conditions