Store the user's unit preferences in git storage

Save and load a usually unused copy of the preferences with the units that
were active the last time the dive list was saved to git storage (this
isn't used in XML files); storing the unit preferences in the data file is
usually pointless (that's a setting of the software, not a property of the
data), but it's a great hint of what the user might expect to see when
creating a backend service that visualizes the dive list without
Subsurface running - so this is basically a functionality for the core
library that Subsurface itself doesn't use but that another consumer of
the library (like an HTML exporter) will need.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/pref.h b/pref.h
index 3c39409a7..c657cf289 100644
--- a/pref.h
+++ b/pref.h
@@ -120,7 +120,7 @@ enum cloud_status {
 	CS_VERIFIED
 };
 
-extern struct preferences prefs, default_prefs;
+extern struct preferences prefs, default_prefs, informational_prefs;
 
 #define PP_GRAPHS_ENABLED (prefs.pp_graphs.po2 || prefs.pp_graphs.pn2 || prefs.pp_graphs.phe)