Fix duration calculation

Some days I'm just a f*cking moron. That code was so stupid that I'm
lacking words. I replaced using the first divecomputer with using the last
divecomputer. When what I wanted was to use the maximum duration.

This looks better.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/dive.c b/dive.c
index 6b45d5355..afe115376 100644
--- a/dive.c
+++ b/dive.c
@@ -221,10 +221,10 @@ static void update_duration(duration_t *duration, int new)
 
 int get_duration_in_sec(struct dive *dive)
 {
-	int duration;
+	int duration = 0;
 	struct divecomputer *dc = &dive->dc;
 	do {
-		duration = dc->duration.seconds;
+		duration = MAX(duration, dc->duration.seconds);
 		dc = dc->next;
 	} while (dc);
 	return duration;