Pick GPS coordinates of dive location via map widget

I have some concerns about the way this is implemented - especially the
use of gtk_grab_add to make the map widget work has me worried. But it
seems to work and survived some test cases that I threw at it.

The GtkButton with the Pixmap looks a little off on my screen, but this
way it was easy to implement. Feel free to come up with a better design.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/dive.h b/dive.h
index c9f43d81e..6a6ab3eee 100644
--- a/dive.h
+++ b/dive.h
@@ -486,7 +486,7 @@ extern void show_dive_stats(struct dive *);
 extern void clear_stats_widgets(void);
 
 extern void show_gps_locations(void);
-extern void show_gps_location(struct dive *);
+extern void show_gps_location(struct dive *, void (*callback)(float, float));
 
 extern void show_yearly_stats(void);