Spring works.

Change-Id: I370012cc80e9019467100bec631c488c10a73141
diff --git a/frc971/zeroing/wrap.h b/frc971/zeroing/wrap.h
index 84b049d..c6ec085 100644
--- a/frc971/zeroing/wrap.h
+++ b/frc971/zeroing/wrap.h
@@ -7,6 +7,7 @@
 // Returns a modified value which has been wrapped such that it is +- period/2
 // away from nearest.
 double Wrap(double nearest, double value, double period);
+float Wrap(float nearest, float value, float period);
 
 }  // namespace zeroing
 }  // namespace frc971