Calibrated camera offset.

Change-Id: I10113c9b80695c0b2407cd1df6fd3fe40d6390ca
diff --git a/y2017/control_loops/superstructure/column/column.h b/y2017/control_loops/superstructure/column/column.h
index b952a78..092e253 100644
--- a/y2017/control_loops/superstructure/column/column.h
+++ b/y2017/control_loops/superstructure/column/column.h
@@ -222,6 +222,8 @@
       ::aos::monotonic_clock::min_time;
 
   ColumnProfiledSubsystem profiled_subsystem_;
+
+  const double vision_error_;
 };
 
 }  // namespace column