Fixed target_receiver bug.

Change-Id: Ib784c70b9d343586e86b8c253a4c11ed2bb29227
diff --git a/y2016/vision/target_receiver.cc b/y2016/vision/target_receiver.cc
index 80a9f6b..04fbac2 100644
--- a/y2016/vision/target_receiver.cc
+++ b/y2016/vision/target_receiver.cc
@@ -344,7 +344,7 @@
         } else {
           filtered_center_right = center_right;
           new_vision_status->target_time = right.capture_time().ToNSec();
-          filtered_center_right =
+          filtered_center_left =
               CalculateFiltered(right, left, center_left, last_center_left);
         }