Fix picture loading

Signed vs unsigned comparisons are such a pain. Since we want offsets to
be +/- 30 minutes around the dive we need to allow negative offsets - but
duration_t was defined as uint32_t.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/units.h b/units.h
index f3c02121a..90d7949b0 100644
--- a/units.h
+++ b/units.h
@@ -71,6 +71,11 @@ typedef struct
 
 typedef struct
 {
+	int32_t seconds; // offsets up to +/- 34 yrs
+} offset_t;
+
+typedef struct
+{
 	int32_t mm;
 } depth_t; // depth to 2000 km