First (broken) try at actually tracking cylinder types

This doesn't actually change the cylinder type info in the dive, because
it's too broken for that.  Instead it prints out what it would change
things to.

The gtk2 notion of text input focus is *really* odd.  Why is the
cylinder type sometimes selected, and sometimes not?

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/display.h b/display.h
index a9d90ece2..5e6a39063 100644
--- a/display.h
+++ b/display.h
@@ -5,6 +5,8 @@
 #include <gdk/gdk.h>
 #include <cairo.h>
 
+extern GtkWidget *main_window;
+
 extern GtkWidget *dive_profile_widget(void);
 extern GtkWidget *dive_info_frame(void);
 extern GtkWidget *extended_dive_info_widget(void);