Fix the name of a variable

Change-Id: I9d071ca6f0a8fe352055fc852cf2820f9b648bd0
diff --git a/frc971/zeroing/zeroing_test.cc b/frc971/zeroing/zeroing_test.cc
index 2f562aa..4cfb5e0 100644
--- a/frc971/zeroing/zeroing_test.cc
+++ b/frc971/zeroing/zeroing_test.cc
@@ -29,10 +29,10 @@
   void MoveTo(PositionSensorSimulator *simulator,
               PotAndIndexPulseZeroingEstimator *estimator,
               double new_position) {
-    PotAndIndexPosition sensor_values_;
+    PotAndIndexPosition sensor_values;
     simulator->MoveTo(new_position);
-    simulator->GetSensorValues(&sensor_values_);
-    estimator->UpdateEstimate(sensor_values_);
+    simulator->GetSensorValues(&sensor_values);
+    estimator->UpdateEstimate(sensor_values);
   }
 
   ::aos::testing::TestSharedMemory my_shm_;