Only update tags in the selected dives if they were changed

If current_dive and displayed_dive still have the same tags then we
shouldn't touch the tags of other selected dives.

Fixes #826

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

1 files changed, 1 insertions, 0 deletions

diff --git a/dive.h b/dive.h
index 56f38f948..b350527a7 100644
--- a/dive.h
+++ b/dive.h
@@ -238,6 +238,7 @@ void taglist_init_global();
 void taglist_free(struct tag_entry *tag_list);
 
 bool taglist_contains(struct tag_entry *tag_list, const char *tag);
+bool taglist_equal(struct tag_entry *tl1, struct tag_entry *tl2);
 int count_dives_with_tag(const char *tag);
 int count_dives_with_person(const char *person);
 int count_dives_with_location(const char *location);