Logged the filtered but not zeroed position.

Change-Id: Ica47de1c6b84fd71540428cba06ac266d2e899fe
diff --git a/frc971/zeroing/zeroing.cc b/frc971/zeroing/zeroing.cc
index 5184ad4..e8cac6f 100644
--- a/frc971/zeroing/zeroing.cc
+++ b/frc971/zeroing/zeroing.cc
@@ -11,6 +11,7 @@
   state->error = estimator.error();
   state->zeroed = estimator.zeroed();
   state->position = estimator.position();
+  state->pot_position = estimator.filtered_position();
 }
 
 ZeroingEstimator::ZeroingEstimator(
@@ -122,6 +123,7 @@
   }
 
   pos_ = start_pos_ + info.encoder;
+  filtered_position_ = start_average + info.encoder;
 }
 
 }  // namespace zeroing