Fixed a small memory leak in divelist.c

In fill_one_dive(), cylinder and location strings are obtained via
get_string(), which needs to allocated a litte bit of memory.

After passing the two pointers ('cylinder' and 'location') as arguments
to gtk_list_store_set() it is safe to release them.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

divelist.c

@@ -556,6 +556,9 @@ static void fill_one_dive(struct dive *dive,
 		DIVE_OTU, dive->otu,
 		DIVE_TOTALWEIGHT, total_weight(dive),
 		-1);
+
+	free(location);
+	free(cylinder);
 }
 
 static gboolean set_one_dive(GtkTreeModel *model,