[gtk+/gtk-3-20] cups: make string non-literals translatable again

[Felipe Borges <felipeborges src gnome org>]

commit 71385044fe8d1d4342d03fbd1b8f487616380293
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Apr 13 20:00:19 2016 +0200

    cups: make string non-literals translatable again
    
    Notice that C_ just takes string literals as arguments.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764585

 modules/printbackends/cups/gtkprintbackendcups.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modules/printbackends/cups/gtkprintbackendcups.c 
b/modules/printbackends/cups/gtkprintbackendcups.c
index 9a4b733..661037b 100644
--- a/modules/printbackends/cups/gtkprintbackendcups.c
+++ b/modules/printbackends/cups/gtkprintbackendcups.c
@@ -4442,7 +4442,7 @@ get_ipp_choice_translation_string (gint  index,
             g_assert_not_reached ();
         }
 
-        translation = NC_("output-bin", string);
+        translation = g_dpgettext2 (GETTEXT_PACKAGE, "output-bin", string);
     }
 
   return translation;