Fix same-node clock offsets in localization utils

Change-Id: Ieed100aa877d27b5257900041ed639505ed9aa5c
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/frc971/control_loops/drivetrain/localization/utils.h b/frc971/control_loops/drivetrain/localization/utils.h
index e2985af..07f9aff 100644
--- a/frc971/control_loops/drivetrain/localization/utils.h
+++ b/frc971/control_loops/drivetrain/localization/utils.h
@@ -47,6 +47,7 @@
       std::string_view node);
 
  private:
+  aos::EventLoop *const event_loop_;
   aos::Fetcher<frc971::control_loops::drivetrain::Output> output_fetcher_;
   aos::Fetcher<frc971::control_loops::drivetrain::Position> position_fetcher_;
   aos::Fetcher<aos::message_bridge::ServerStatistics> clock_offset_fetcher_;