[pan2] Fixed showing combobox options unlocalized

[Marek Černocký <mcernocky src gnome org>]

commit 05f02adab3d6be3a63fce692cc9057dce5c7cbae
Author: Marek Cernocky <marek_cernocky conel cz>
Date:   Mon Sep 11 11:03:57 2017 +0200

    Fixed showing combobox options unlocalized

 pan/gui/prefs-ui.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pan/gui/prefs-ui.cc b/pan/gui/prefs-ui.cc
index f735120..4b0d37c 100644
--- a/pan/gui/prefs-ui.cc
+++ b/pan/gui/prefs-ui.cc
@@ -570,7 +570,7 @@ namespace pan
     for (size_t i=0; i<G_N_ELEMENTS(strings); ++i) {
       GtkTreeIter iter;
       gtk_list_store_append (store, &iter);
-      gtk_list_store_set (store, &iter, 0, strings[i][0], 1, strings[i][1], -1);
+      gtk_list_store_set (store, &iter, 0, gettext(strings[i][0]), 1, strings[i][1], -1);
       if (mode == strings[i][1])
         sel_index = i;
     }