Fix deco display bug for dives with multiple samples at the same time

While one might argue that multiple samples with the same time are 'odd'
that still shouldn't be an excuse to incorrectly reset the ceiling value
for them back to 0.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/profile.c b/profile.c
index 1448b1750..5237edb7e 100644
--- a/profile.c
+++ b/profile.c
@@ -1874,7 +1874,10 @@ static void calculate_deco_information(struct dive *dive, struct divecomputer *d
 				if (min_pressure > tissue_tolerance)
 					tissue_tolerance = min_pressure;
 			}
-			entry->ceiling = deco_allowed_depth(tissue_tolerance, surface_pressure, dive, !prefs.calc_ceiling_3m_incr);
+			if (t0 == t1)
+				entry->ceiling = (entry - 1)->ceiling;
+			else
+				entry->ceiling = deco_allowed_depth(tissue_tolerance, surface_pressure, dive, !prefs.calc_ceiling_3m_incr);
 		}
 	}