[gnome-commander] Add C_ keyword in po/Makevars, needed for translatable strings marked with C_

[Uwe Scholz <uwescholz src gnome org>]

commit 51e34332703207a820fec7026cc0bedf6b8c05d9
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Tue Sep 14 08:18:24 2021 +0200

    Add C_ keyword in po/Makevars, needed for translatable strings marked with C_
    
    See https://people.gnome.org/~ryanl/glib-docs/glib-I18N.html#C-:CAPS

 po/Makevars | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/Makevars b/po/Makevars
index 54f1e1a1..1afc216d 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -12,6 +12,7 @@ XGETTEXT_OPTIONS = \
   --from-code=UTF-8 \
   --keyword=_ --flag=_:1:pass-c-format \
   --keyword=N_ --flag=N_:1:pass-c-format \
+  --keyword=C_:1c,2 \
   --flag=g_log:3:c-format --flag=g_logv:3:c-format \
   --flag=g_error:1:c-format --flag=g_message:1:c-format \
   --flag=g_critical:1:c-format --flag=g_warning:1:c-format \