Send out 0 for the gyro while zeroing.

Change-Id: I118cc6214a53bdb8b302494090544152179188b8
diff --git a/frc971/wpilib/gyro_sender.cc b/frc971/wpilib/gyro_sender.cc
index 6c7ca3f..d3b9500 100644
--- a/frc971/wpilib/gyro_sender.cc
+++ b/frc971/wpilib/gyro_sender.cc
@@ -108,6 +108,8 @@
       {
         message->angle = new_angle;
         LOG_STRUCT(DEBUG, "collected while zeroing", *message);
+        message->angle = 0.0;
+        message.Send();
       }
       zeroing_data[zeroing_index] = new_angle;
       ++zeroing_index;