Introduce an on/off switch for calculating ndl/tts

Let the user choose if the calculation of ndl and tts is worth the time
it takes.

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/pref.h b/pref.h
index e59ad1c6a..29c9df2f0 100644
--- a/pref.h
+++ b/pref.h
@@ -28,6 +28,7 @@ struct preferences {
 	short profile_calc_ceiling;
 	short calc_ceiling_3m_incr;
 	short calc_all_tissues;
+	short calc_ndl_tts;
 	short gflow;
 	short gfhigh;
 	int map_provider;