made stuff compile on the crio
diff --git a/frc971/control_loops/state_feedback_loop.h b/frc971/control_loops/state_feedback_loop.h
index c49ca44..8fe18f8 100644
--- a/frc971/control_loops/state_feedback_loop.h
+++ b/frc971/control_loops/state_feedback_loop.h
@@ -3,6 +3,9 @@
// wikipedia article is <http://en.wikipedia.org/wiki/State_observer>
+// Stupid vxworks system headers define it which blows up Eigen...
+#undef m_data
+
#include "Eigen/Dense"
template <int number_of_states, int number_of_inputs, int number_of_outputs>