Third robot commit.

All tests pass!

Change-Id: I086248537f075fd06afdfb3e94670eb7646aaf6c
diff --git a/frc971/control_loops/drivetrain/drivetrain.cc b/frc971/control_loops/drivetrain/drivetrain.cc
index f2b14a9..5757b58 100644
--- a/frc971/control_loops/drivetrain/drivetrain.cc
+++ b/frc971/control_loops/drivetrain/drivetrain.cc
@@ -107,6 +107,8 @@
       right_gear_ = ComputeGear(position->right_shifter_position,
                                 dt_config_.right_drive, right_high_requested_);
       break;
+    case ShifterType::NO_SHIFTER:
+      break;
   }
 
   kf_.set_controller_index(ControllerIndexFromGears());