Planner: don't do unnecessary work on empty dive plans

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

1 files changed, 1 insertions, 0 deletions

diff --git a/planner.h b/planner.h
index 49f8be5ef..d5607a948 100644
--- a/planner.h
+++ b/planner.h
@@ -13,6 +13,7 @@ extern void show_planned_dive(char **error_string_p);
 extern void set_last_stop(bool last_stop_6m);
 extern void get_gas_from_events(struct divecomputer *dc, int time, int *o2, int *he);
 extern int get_gasidx(struct dive *dive, int o2, int he);
+extern bool diveplan_empty(struct diveplan *diveplan);
 
 extern struct dive *planned_dive;
 extern char *cache_data;