Added shot_disc_count to the indexer.
diff --git a/frc971/control_loops/index/index.h b/frc971/control_loops/index/index.h
index e3a67c5..c9dc86f 100644
--- a/frc971/control_loops/index/index.h
+++ b/frc971/control_loops/index/index.h
@@ -246,6 +246,7 @@
   // Count of the number of discs that we have collected.
   int32_t hopper_disc_count_;
   int32_t total_disc_count_;
+  int32_t shot_disc_count_;
 
   enum class Goal {
     // Hold position, in a low power state.