[gnome-mud] Fix Makefile.am for doc translation

[Mario Blättermann <mariobl src gnome org>]

commit 1c18ed4b470d9c21d62e4f8afc2db50884f7ebe3
Author: Mario Blättermann <mario blaettermann gmail com>
Date:   Sat Mar 10 22:23:34 2018 +0100

    Fix Makefile.am for doc translation

 doc/gnome-mud-manual/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/doc/gnome-mud-manual/Makefile.am b/doc/gnome-mud-manual/Makefile.am
index c9e0135..2f322f1 100644
--- a/doc/gnome-mud-manual/Makefile.am
+++ b/doc/gnome-mud-manual/Makefile.am
@@ -11,7 +11,7 @@ DOC_FIGURES = \
        figures/preferences-window.png \
        figures/profiles-window.png
 
-DOC_LINGUAS =
+DOC_LINGUAS = de
 
 
 -include $(top_srcdir)/git.mk