Change ZeroingEstimator constructors to explicit

Change-Id: I6dc6df30d7351ac52f4a8a06dfea57bbf1a47fdf
diff --git a/frc971/control_loops/profiled_subsystem.h b/frc971/control_loops/profiled_subsystem.h
index 84803af..fe64b75 100644
--- a/frc971/control_loops/profiled_subsystem.h
+++ b/frc971/control_loops/profiled_subsystem.h
@@ -217,8 +217,8 @@
     const typename ZeroingEstimator::ZeroingConstants &zeroing_constants,
     const ::frc971::constants::Range &range, double default_velocity,
     double default_acceleration)
-    : ProfiledSubsystem<3, 1, ZeroingEstimator>(::std::move(loop),
-                                                {{zeroing_constants}}),
+    : ProfiledSubsystem<3, 1, ZeroingEstimator>(
+          ::std::move(loop), {{ZeroingEstimator(zeroing_constants)}}),
       profile_(::aos::controls::kLoopFrequency),
       range_(range),
       default_velocity_(default_velocity),