Propagated zeroing errors to superstructure so it ESTOPs

Change-Id: I0dd424267aa737a09867ebab541f7cdf7dd30523
diff --git a/y2016/control_loops/superstructure/superstructure.h b/y2016/control_loops/superstructure/superstructure.h
index 1350a15..a860f09 100644
--- a/y2016/control_loops/superstructure/superstructure.h
+++ b/y2016/control_loops/superstructure/superstructure.h
@@ -16,6 +16,8 @@
 namespace superstructure {
 namespace testing {
 class SuperstructureTest_DisabledGoalTest_Test;
+class SuperstructureTest_ArmZeroingErrorTest_Test;
+class SuperstructureTest_IntakeZeroingErrorTest_Test;
 }  // namespace testing
 
 class Superstructure
@@ -107,6 +109,8 @@
 
  private:
   friend class testing::SuperstructureTest_DisabledGoalTest_Test;
+  friend class testing::SuperstructureTest_ArmZeroingErrorTest_Test;
+  friend class testing::SuperstructureTest_IntakeZeroingErrorTest_Test;
   Intake intake_;
   Arm arm_;