[pan2] Rules Enabled preference flag wasn't loaded

[Petr Kovář <pmkovar src gnome org>]

commit f55cebc3e27a93fbd663929c473805b6d688f042
Author: Andrew Nile <andrewjnile gmail com>
Date:   Tue Mar 8 22:10:13 2016 +0100

    Rules Enabled preference flag wasn't loaded
    
    "Rules Enabled" preference flag wasn't loaded before it was used the
    first time.

 pan/gui/header-pane.cc |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/pan/gui/header-pane.cc b/pan/gui/header-pane.cc
index dd1be23..81192fe 100644
--- a/pan/gui/header-pane.cc
+++ b/pan/gui/header-pane.cc
@@ -2042,6 +2042,7 @@ HeaderPane :: HeaderPane (ActionManager       & action_manager,
   _root = scroll;
 
   search_activate (this); // calls rebuild_filter
+  _prefs._rules_enabled = prefs.get_flag("enable-rules", true);
   rules(_prefs._rules_enabled);
 
   _data.add_listener (this);